Results 61 to 70 of about 488 (114)

The spectral norm of a nonnegative matrix

Linear Algebra and its Applications, 1990
The author proves that for any matrix \(A=(a_{ij})\) with \(| A| =(| a_{ij}|)\) it holds that \(\| | A| \|_ 2=\min \{r_ 1(B)\cdot c_ 1(C):\) \(B\circ C=A\}\geq \| A\|_ 2\) and determines the case of equality and the conditions of the uniqueness of minimizers, where \(c_ 1(A)=\max_{j}(\sum_{i}| a_{ij}|^ 2)^{1/2}\) and \(r_ 1(A)=\max_{i}(\sum_{j}| a_{ij}|
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Properties of spectrally bounded compact elementary operators [PDF]

Contributions to Mathematics, 2021
Willy Kangogo, Nyaare Benard Okelo, Omolo Ongati   +2 more
doaj   +1 more source

Sparsity-Enhanced Constrained Least-Squares Spectral Analysis with Greedy-FISTA

Remote Sensing
The utilization of the inversion-based algorithm for spectral decomposition using constrained least-squares spectral analysis (CLSSA) facilitates a time–frequency spectrum with higher temporal and frequency resolution. The conventional CLSSA algorithm is
Guohua Wei, Wubing Deng, Zhenchun Li, Li-Yun Fu   +3 more
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Global Existence and Convergence Rates for the Strong Solutions in H2 to the 3D Chemotaxis Model

Journal of Applied Mathematics, 2013
We are concerned with a 3D chemotaxis model arising from biology, which is a coupled hyperbolic-parabolic system. We prove the global existence of a strong solution when H2-norm of the initial perturbation around a constant state is sufficiently small ...
Weijun Xie, Yinghui Zhang, Yuandong Xiao, Wei Wei   +3 more
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Spectral norm and energy of a digraph with respect to a VDB topological index

Heliyon
The set of singular values of a digraph with respect to a vertex-degree based topological index is the set of all singular values of its general adjacency matrix.
Carlos Espinal, Juan Monsalve, Juan Rada
doaj   +1 more source

Spectral normative modeling of brain structure

Abstract Normative modeling in neuroscience aims to characterize interindividual variation in brain phenotypes and establish reference ranges, or brain charts, against which individuals can be compared. Normative models are typically limited to coarse spatial scales due to computational constraints, limiting their ...
Mansour L. Sina, Maria A. Di Biase, Chen Zhang, Fang Tian, Shaoshi Zhang, Hongwei Yan, Aihuiping Xue, Joanna Su Xian Chong, Niousha Dehestani, Eric Kwun-Kei Ng, Fang Ji, Xing Qian, Yichi Zhang, Wen Liang Loh, Joice Sin Yi Tham, Voon Hao Lew, Samantha Hui Fang Neo, Fiona Jia Wen Goh, Narayanaswamy Venketasubramanian, Eddie Chong, Nagaendran Kandiah, Ai Peng Tan, Michael J. Meaney, Marielle V. Fortier, Yap Seng Chong, Woon-Puay Koh, Vanessa Cropley, Jakob Seidlitz, Aaron Alexander-Bloch, Richard Bethlehem, Christopher Chen, Juan Helen Zhou, B.T. Thomas Yeo, Andrew Zalesky   +33 more
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Spectral radius and spectral norm [PDF]

Czechoslovak Mathematical Journal, 1974
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Spectral norm of random tensors

, 2014
5 ...
Tomioka, Ryota, Suzuki, Taiji
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Norms and the spectral radius of matrices [PDF]

Czechoslovak Mathematical Journal, 1962
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Efficient High-Resolution Sparse Channel Estimation Based on Temporal Correlation in MIMO-OFDM Systems

Sensors
In this work, high-resolution sparse channel estimation in multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems is addressed.
Hui Xie, Yide Wang, Guillaume Andrieux, Shaoyang Men   +3 more
doaj   +1 more source