Results 211 to 220 of about 7,478 (247)

A phantom mimicking layered biological microenvironments investigated with 7T diffusion weighted MRI. [PDF]

Sci Rep
Łabieniec Ł, Szymański K, Wieteska M, Domański G, Brancewicz M, Lisowski Ł, Lipiński K, Łaźny R, Bogorodzki P.   +8 more
europepmc   +1 more source

Near-field-free super-potential FFT method for the three-dimensional free-space Poisson equation

Exl L, Schaffer S.
europepmc   +1 more source

Singular values of a real rectangular tensor

Journal of Mathematical Analysis and Applications, 2010
Eigenvalues for real square tensors have been introduced and nice properties such as the Perron-Frobenius theorem for eigenvalues of nonnegative square tensors have been obtained in recent years. Real rectangular tensors arise from the strong ellipticity condition problem in solid mechanics and the entanglement problem in quantum physics. In this paper
Liqun Qi, Guanglu Zhou
exaly   +3 more sources

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On copositiveness identification of partially symmetric rectangular tensors

Journal of Computational and Applied Mathematics, 2020
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Chunyan Wang 0020, Haibin Chen, Yiju Wang, Guanglu Zhou   +3 more
openaire   +1 more source

Partially symmetric nonnegative rectangular tensors and copositive rectangular tensors

Journal of Industrial and Management Optimization, 2019
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Gu, Yining, Wu, Wei
exaly   +3 more sources

Convergence of an algorithm for the largest singular value of a nonnegative rectangular tensor

Linear Algebra and Its Applications, 2013
The authors present an iterative algorithm for computing the largest singular value of a nonnegative rectangular tensor. The convergence of this algorithm for any irreductibile nonnegative rectangular tensor is also proved.
Liqun Qi, Guanglu Zhou, Louis Caccetta
exaly   +4 more sources

Volume average demagnetizing tensor of rectangular prisms

IEEE Transactions on Magnetics, 1998
An exact analytic formula is presented for the magnetostatic field produced by a three-dimensional array of uniformly magnetized rectangular prisms. It is derived from the volume integration of a point-function demagnetizing tensor. The values of the point-function demagnetizing tensor at the centers of rectangular prisms of different aspect-ratios are
H. Fukushima, Y. Nakatani, N. Hayashi
exaly   +2 more sources

E-characteristic polynomials of real rectangular tensor

Transactions of Tianjin University, 2014
By the resultant theory, the E-characteristic polynomial of a real rectangular tensor is defined. It is proved that an E-singular value of a real rectangular tensor is always a root of the E-characteristic polynomial. The definition of the regularity of square tensors is generalized to the rectangular tensors, and in the regular case, a root of the ...
Wei Wu, Xiaoxiao Chen
exaly   +2 more sources

Singular values of nonnegative rectangular tensors

Frontiers of Mathematics in China, 2011
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Yang, Yuning, Yang, Qingzhi
openaire   +2 more sources

Singular value inclusion sets for rectangular tensors

Linear and Multilinear Algebra, 2017
Two singular value inclusion sets for rectangular tensors are given. These sets provide two upper bounds and lower bounds for the largest singular value of nonnegative rectangular tensors, which ca...
Jianxing Zhao, Chaoqian Li
openaire   +1 more source