Results 191 to 200 of about 137,800 (236)
Robust Watermarking based on Subsampling and Nonnegative Matrix Factorization [PDF]
, 2008 Wei Lu, Hongtao Lu
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Quantitative Biology, Volume 13, Issue 4, December 2025.Abstract Estimating the transmission fitness of SARS‐CoV‐2 variants and understanding their evolutionary fitness trends are important for epidemiological forecasting. Existing methods are often constrained by their parametric natures and do not satisfactorily align with the observations during COVID‐19.
Md Jubair Pantho +5 more
wiley +1 more source
Modeling angiogenesis under Robin boundary conditions
Quantitative Biology, Volume 13, Issue 4, December 2025.Abstract In this study, we show an example of a numerical model based on the Keller–Segel system of equations to simulate angiogenesis in response to chemotaxis under Robin boundary conditions, which represent the presence of flux at the tumor. Different parameters of the model are modified to identify key biological factors relevant to the behavior of
Pablo Álvarez‐Caudevilla +2 more
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Bayesian Inference for Nonnegative Matrix Factorisation Models [PDF]
, 2009 Ali Taylan Cemgil
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Magnetic Resonance in Medicine, Volume 94, Issue 3, Page 1248-1256, September 2025.Abstract Purpose To experimentally evaluate the change in radial diffusivity with diffusion time (∆D⊥$$ \Delta {\mathrm{D}}_{\perp } $$) as a simple estimate of axon diameter. Methods Ex vivo ferret spinal cords were imaged via MRI and scanning electron microscopy.
Hannah E. Alderson +3 more
wiley +1 more source
Projective Nonnegative Matrix Factorization for Image Compression and Feature Extraction
, 2005 Zhijian Yuan, Erkki Oja
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Tumor Clustering Using Nonnegative Matrix Factorization With Gene Selection [PDF]
, 2009 Zheng Chun-Hou +3 more
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Quantitative Biology, Volume 13, Issue 3, September 2025.Abstract Alzheimer’s disease (AD) is a common neurodegenerative disorder nowadays. Amyloid‐beta (Aβ) and tau proteins are among the main contributors to the AD progression. In AD, Aβ proteins clump together to form plaques and disrupt cell functions.
Swadesh Pal, Roderick Melnik
wiley +1 more source
Multi‐stage stochastic frontier analysis for simple networks
International Transactions in Operational Research, Volume 32, Issue 5, Page 2497-2522, September 2025.Abstract We develop a method for modelling multi‐stage production using stochastic frontier analysis. This approach is suitable for the analysis of costs or output where intermediate outputs become inputs into a subsequent stage of the production process, either within an organisation or in the form of a supply chain.
Geraint Johnes +2 more
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