Results 51 to 60 of about 4,185 (184)
Journal of Field Robotics, EarlyView.ABSTRACT Early detection of breast abnormalities remains challenging: manual palpation is subjective and operator‐dependent, while imaging modalities may miss small or subtle stiffness anomalies. This paper presents a biomimetic multifinger robotic palpation approach intended to support early breast‐cancer screening and follow‐up assessment as a proof ...
Kai Cheng +7 more
wiley +1 more source
Convexity of the inverse and Moore–Penrose inverse
, 2011 Convexity properties of the inverse of positive definite matrices and the Moore–Penrose inverse of nonnegative definite matrices with respect to the partial ordering induced by nonnegative definiteness are studied.
Nordström, Kenneth, Kenneth Nordström
core +1 more source
On Selection of Cross‐Section Averages in Non‐Stationary Environments
Journal of Time Series Analysis, EarlyView.ABSTRACT Information criteria (ICs) have been widely used in factor models to estimate an unknown number of latent factors. It has recently been shown that ICs perform well in Common Correlated Effects (CCE) and related settings when selecting a set of cross‐section averages (CAs) sufficient for the factor space under stationary factors.
Jan Ditzen, Ovidijus Stauskas
wiley +1 more source
On an inequality related to the volume of a parallelepiped
Examples and CounterexamplesThe problem of establishing an upper bound for the volume of a parallelepiped is considered by utilizing an original approach involving a skew-symmetric matrix of order four (along with its Moore–Penrose inverse).
Oskar Maria Baksalary, Götz Trenkler
doaj +1 more source
On generalized inverses of regular elements in an arbitrary semiring
上海师范大学学报. 自然科学版, 2018 In this paper, we investigate the generalized invertibility for regular elements in an arbitrary semiring. We give some sufficient conditions for the existence of a special kind of {1,2} inverse of a regular element a in an arbitrary semiring and give ...
Israr Ali Khan, Wang Qingwen
doaj +1 more source
Expression for the perturbation of the weighted Moore-Penrose inverse
, 2000 We consider the perturbation formula for the weighted Moore-Penrose inverse of a rectangular matrix and give an explicit expression for the weighted Moore-Penrose inverse of a perturbed matrix under the weakest rank condition.
Wei, Yimin, Wu, Hebing
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Journal of Time Series Analysis, EarlyView.ABSTRACT The paper deals with the construction of a synthetic indicator of economic growth, obtained by projecting a quarterly measure of aggregate economic activity, namely gross domestic product (GDP), into the space spanned by a finite number of smooth principal components, representative of the medium‐to‐long‐run component of economic growth of a ...
Alessandro Giovannelli +2 more
wiley +1 more source
The Natural Components of a Regular Linear System
Oxford Bulletin of Economics and Statistics, EarlyView.ABSTRACT The analysis of a finite‐dimensional regular linear system may be simplified by separating the system into its natural components. The natural components are smaller linear systems on separate subspaces whose dimensions sum to the dimension of the original linear system.
Brendan K. Beare, Phil Howlett
wiley +1 more source
Communications in Advanced Mathematical Sciences, 2020 In this work, a family of iterative algorithms for approximating the inverse of a square matrix and the Moore-Penrose inverse of a non-square one is proposed.
Esmaeil Kokabifar
doaj +1 more source
Electronic Proceedings in Theoretical Computer Science, 2014 A denotational semantics of quantum Turing machines having a quantum control is defined in the dagger compact closed category of finite dimensional Hilbert spaces.
Miklós Bartha
doaj +1 more source