Results 21 to 30 of about 604,001 (296)

An Approximate Schur Decomposition-Based Spatial Domain Color Image Watermarking Method

IEEE Access, 2019
In this paper, an approximate Schur decomposition-based spatial domain blind color image watermarking method is proposed to protect the copyright of color images, which has low computation complexity similiar to the watermarking technique in the spatial ...
Qingtang Su, Zihan Yuan, Decheng Liu
doaj   +1 more source

An Improved Traffic Matrix Decomposition Method with Frequency-Domain Regularization

, 2012
We propose a novel network traffic matrix decomposition method named Stable Principal Component Pursuit with Frequency-Domain Regularization (SPCP-FDR), which improves the Stable Principal Component Pursuit (SPCP) method by using a frequency-domain noise
Hu, Kai, Wang, Zhe, Yin, Baolin
core   +1 more source

Constraint interface preconditioning for topology optimization problems [PDF]

, 2015
The discretization of constrained nonlinear optimization problems arising in the field of topology optimization yields algebraic systems which are challenging to solve in practice, due to pathological ill-conditioning, strong nonlinearity and size.
Kocvara, Michal, Loghin, Daniel, Turner, James   +2 more
core   +2 more sources

Spatial-Temporal, Parallel, Physics-Informed Neural Networks for Solving Forward and Inverse PDE Problems via Overlapping Domain Decomposition

Aerospace Research Communications
Physics-informed neural networks (PINNs) have emerged as an effective tool for solving both forward and inverse partial differential equation (PDE) problems.
Hongwei Ye, Chuanfu Xu, Yuanye Zhou, Xuhui Meng   +3 more
doaj   +1 more source

Domain decomposition preconditioners for the spectral collocation method [PDF]

, 1988
Several block iteration preconditioners are proposed and analyzed for the solution of elliptic problems by spectral collocation methods in a region partitioned into several rectangles.
Quarteroni, Alfio, Sacchilandriani, Giovanni   +1 more
core   +2 more sources

A Rigorous Finite-Element Domain Decomposition Method for Electromagnetic Near Field Simulations

, 2008
Rigorous computer simulations of propagating electromagnetic fields have become an important tool for optical metrology and design of nanostructured optical components.
Burger, S., Schmidt, F., Schädle, A., Zschiedrich, L.   +3 more
core   +1 more source

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

Time integration and the Trefftz Method Part I - First-order and parabolic problems

Computer Assisted Methods in Engineering and Science, 2023
The finite element method is applied in the time domain to establish formulations for the integration of first-order and parabolic (transient) problems. The modal decomposition concept is applied using two distinct approaches.
João A. Teixeira de Freitas
doaj  

Transcriptional network analysis of PTEN‐protein‐deficient prostate tumors reveals robust stromal reprogramming and signs of senescent paracrine communication

Molecular Oncology, EarlyView.
Combining PTEN protein assessment and transcriptomic profiling of prostate tumors, we uncovered a network enriched in senescence and extracellular matrix (ECM) programs associated with PTEN loss and conserved in a mouse model. We show that PTEN‐deficient cells trigger paracrine remodeling of the surrounding stroma and this information could help ...
Ivana Rondon‐Lorefice, Jose I. Lopez, Aitziber Ugalde‐Olano, Maite Zufiaurre, Ianire Astobiza, Natalia Martin‐Martin, Laura Bozal‐Basterra, Saioa Garcia‐Longarte, Amaia Zabala‐Letona, Sofia Rey, Aida Santos‐Martin, Miguel Unda, Ana Loizaga‐Iriarte, Mariona Graupera, Paolo Nuciforo, Arkaitz Carracedo, Isabel Mendizabal   +16 more
wiley   +1 more source

Non-Overlapping Domain Decomposition for 1D Optimal Control Problems Governed by Time-Fractional Diffusion Equations on Coupled Domains: Optimality System and Virtual Controls

Fractal and Fractional
We consider a non-overlapping domain decomposition method for optimal control problems of the tracking type governed by time-fractional diffusion equations in one space dimension, where the fractional time derivative is considered in the Caputo sense. We
Günter Leugering, Vaibhav Mehandiratta, Mani Mehra   +2 more
doaj   +1 more source