Results 51 to 60 of about 341,424 (240)
F-2D-QPCA: A Quaternion Principal Component Analysis Method for Color Face Recognition
IEEE Access, 2020 Two-dimensional quaternion principal component analysis (2D-QPCA) is one of the successful dimensionality reduction methods for color face recognition. However, 2D-QPCA is sensitive to outliers.
Minghui Wang +3 more
doaj +1 more source
Spectral Radii of Fixed Frobenius Norm Perturbations of Nonnegative Matrices [PDF]
SIAM Journal on Matrix Analysis and Applications, 1999 Let A be an n X n nonnegative matrix. In this paper we consider the problems of maximizing the spectral radii of (i) A + ,X. and (ii) A + D, where X is a real n X n matrix whose Frobenius norm is restricted to be 1 and where D is as X but is further constrained to be a diagonal matrix. For both problems the maximums occur at nonnegative X and D, and we
Lixing Han +2 more
openaire +1 more source
Frobenius-like groups as groups of automorphisms
, 2014 A finite group FH is said to be Frobenius-like if it has a nontrivial nilpotent normal subgroup F with a nontrivial complement H such that FH/[F,F] is a Frobenius group with Frobenius kernel F/[F,F].
Ismail Suayip Guloglu (17191279) +2 more
core +4 more sources
Advanced Intelligent Systems, EarlyView.A scalable distributed observer framework for LiDAR sensor networks is presented for robust tracking and pose estimation of mobile robots. By combining adaptable 3D detection, clustering‐based communication reduction, and intermittent inertial fusion, accurate and efficient estimation is achieved under occlusions and sensing constraints, with formally ...
Isabella Luppi, Ehsan Hashemi
wiley +1 more source
Subspace‐Based System Identification From Binary Measurements
Asian Journal of Control, EarlyView.ABSTRACT This paper is concerned with subspace identification from binary measurements for systems whose dynamical behavior can be splited into a deterministic and a stochastic subsystem. An identification algorithm is detailed. The main contribution of the proposed identification algorithm lies in the identification of both the deterministic subsystem
Alex Ali Mestrah +2 more
wiley +1 more source
Frobenius Non-Stability of Nilpotent Groups [PDF]
, 2023 A countable discrete group is said to be Frobenius stable if every function from the group to unitary matrices that is "almost multiplicative" in the Frobenius norm is "close" to a unitary representation in the Frobenius norm.
Glebe, Forrest
core +1 more source
Consistency of the total least squares estimator in the linear errors-in-variables regression
Modern Stochastics: Theory and Applications, 2018 This paper deals with a homoskedastic errors-in-variables linear regression model and properties of the total least squares (TLS) estimator. We partly revise the consistency results for the TLS estimator previously obtained by the author [18]. We present
Sergiy Shklyar
doaj +1 more source
Chemistry – A European Journal, EarlyView.Two families of bTurea‐derived biradicals, bcTmols and bcTCOOKs, were prepared as polarizing agents for dynamic nuclear polarization (DNP)‐enhanced NMR through short and efficient synthetic routes. The best‐performing biradical, bcTCOOK‐M2, containing two methyl groups on the urea bridge, provided signal enhancements of up to ∼220 at 14.1 T and 100 K ...
Ancy T. Wilson +3 more
wiley +1 more source
Homophily‐adjusted social influence estimation
Canadian Journal of Statistics, EarlyView.Abstract Homophily and social influence are two key concepts of social network analysis. Distinguishing between these phenomena is difficult, and approaches to disambiguate the two have been primarily limited to longitudinal data analyses. In this study, we provide sufficient conditions for valid estimation of social influence through cross‐sectional ...
Hanh T.D. Pham, Daniel K. Sewell
wiley +1 more source
A note on Frobenius norm preservers of Jordan product [PDF]
Operators and Matrices, 2013 [1] A. FOSNER, B. KUZMA, T. KUZMA, N.-S. SZE, Maps preserving matrix pairs with zero Jordan product, Linear Multilinear Algebra 59, 5 (2011), 507–529. [2] R. HORN, C. JOHNSON, Topics in Matrix Analysis. Cambridge UP, 1991. [3] B. KUZMA, G. LESNJAK, C.-K. LI, T. PETEK, L. RODMAN, Conditions for linear independence of two operators.
Bojan Kuzma, Tatjana Petek
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