Results 111 to 120 of about 3,570,033 (364)
Heuristics for a Matrix Symmetrization Problem [PDF]
, 2008 We consider the following problem: given a square, nonsymmetric, $(0,1)$-matrix, find a permutation of its columns that yields a zero-free diagonal and maximizes the symmetry. The problem is known to be NP-hard. We propose a fast iterative-improvement based heuristic and evaluate the performance of the heuristic on a large set of matrices.
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From Low Symmetry to High Dissymmetry: Chiral Plasmonic Films of Binary and Nanobipyramid Assemblies
Advanced Functional Materials, EarlyView.This work develops highly dissymmetric chiral plasmonic thin films by helically assembling gold nano bipyramids within a liquid‐crystal template. Engineering of the chiroptical response is achieved by varying particle size and geometry, as well as preparing binary assemblies.
Martyna Wasiluk +10 more
wiley +1 more source
On minimizing the largest eigenvalue of a symmetric matrix
Linear Algebra and its Applications, 1995 This paper concerns the (nondifferentiable) optimization problem (1) \(\lambda^* = \inf_{x \in \mathbb{R}^ m} \lambda_ 1 (x)\), where \(\lambda_ 1 (x)\) are the largest eigenvalues of \(A(x) = A_ 0 + \sum^ m_{j=1} x_ jA_ j\) and the \(A_ j\) are symmetric. It gives a sufficient condition on \(x\) to satisfy \(\lambda_ 1 (x) - \varepsilon \leq \lambda^*
Batool Nekooie, M.K.H. Fan
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Advanced Functional Materials, EarlyView.A spin group (SG)‐based mechanism is proposed to realize a single pair of Weyl points. PT‐symmetric nodal lines (NLs) persist under T‐breaking, protected by the combination of SG and P symmetry. When considering spin‐orbit coupling, the SG‐protected NL will split into Weyl points, which will also induce anomalous transport phenomena arising from ...
Shifeng Qian +6 more
wiley +1 more source
Advanced Functional Materials, EarlyView.Poly(heptazine) imides (PHIs), a crystalline carbon nitride subclass, intercalate metals to deliver high stability, tunable electronics, and efficient charge separation. These features enable solar‐driven applications such as hydrogen evolution, CO₂ reduction, and organic synthesis.
Gabriel A. A. Diab +6 more
wiley +1 more source
An approximate solution for a system with a symmetric matrix
Computers & Mathematics with Applications, 1997 This paper deals with a discrete approximation for the solution of the boundary value problem for an ordinary differential equation (unusually formulated). Using methods of the Numerov's type a system of equations is obtained. The matrix of this large system of equations is reformulated as the product of two bounded matrices for the purpose of ...
L.E. Garey, C. J. Gladwin, R. E. Shaw
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A note on the growth factor in Gaussian elimination for generalized Higham matrices
, 2013 The Higham matrix is a complex symmetric matrix A=B+iC, where both B and C are real, symmetric and positive definite and $\mathrm{i}=\sqrt{-1}$ is the imaginary unit. For any Higham matrix A, Ikramov et al.
Gu, Xian-Ming +2 more
core
Breaking the Capacity Limit for WO3 Anode‐Based Li‐Ion Batteries Using Photo‐Assisted Charging
Advanced Functional Materials, EarlyView.This image illustrates a photo‐assisted rechargeable lithium‐ion battery. (a) shows the battery structure, where light enhances electron‐hole generation in the anode, boosting ion flow. (b) compares discharging performance, revealing over 60% higher capacity under light compared to dark conditions, showcasing the benefit of light‐assisted energy ...
Rabia Khatoon +7 more
wiley +1 more source
Matlab Applications for Skew-Symmetric Matrices and Integral Curves in Lorentzian Spaces
Düzce Üniversitesi Bilim ve Teknoloji Dergisi, 2017 In [8], the authors obtained the non-zero solutions of the equation A(x)=0, in Lorentzian space where A is a skew-symmetric matrix corresponding to the linear map A and got normal forms of the skew-symmetric matrix A, depending on the causal characters ...
Tuhahan Turhan +2 more
doaj +4 more sources
Atomic Size Misfit for Electrocatalytic Small Molecule Activation
Advanced Functional Materials, EarlyView.This review explores the application and mechanisms of atomic size misfit in catalysis for small molecule activation, focusing on how structural defects and electronic properties can effectively lower the energy barriers of chemical bonds in molecules like H2O, CO2, and N2.
Ping Hong +3 more
wiley +1 more source