Results 51 to 60 of about 150,415 (331)
Vibration-Based Fault Diagnosis of Commutator Motor
Shock and Vibration, 2018 This paper presents a study on vibration-based fault diagnosis techniques of a commutator motor (CM). Proposed techniques used vibration signals and signal processing methods. The authors analysed recognition efficiency for 3 states of the CM: healthy CM,
A. Głowacz, W. Glowacz
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Eulerian dynamics with a commutator forcing [PDF]
, 2016 : We study a general class of Euler equations driven by a forcing with a commu-tator structure of the form [L; u]() = L(u)L()u, where u is the velocity eld and L isthe \action which belongs to a rather general class of translation invariant operators ...
R. Shvydkoy, E. Tadmor
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Journal of Algebra, 2003 The purpose of this paper is to study finite-dimensional Lie algebras over a field k of characteristic zero which admit a commutative polarization (CP). Among the many results and examples, it is shown that, if k is algebraically closed, the nilradical N of a parabolic subalgebra in A_n and C_n has such a CP.
ELASHVILI, Alexander, OOMS, Alfons
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Associativity as commutativity [PDF]
Journal of Symbolic Logic, 2006 AbstractIt is shown that coherence conditions for monoidal categories concerning associativity are analogous to coherence conditions for symmetric strictly monoidal categories, where associativity arrows are identities. Mac Lane's pentagonal coherence condition for associativity is decomposed into conditions concerning commutativity, among which we ...
Došen, Kosta, Petrć, Zoran
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Commutation matrices and Commutation tensors [PDF]
Linear and Multilinear Algebra, 2018 The commutation matrix was first introduced in statistics as a transposition matrix by Murnaghan in 1938. In this paper, we first investigate the commutation matrix which is employed to transform a matrix into its transpose. We then extend the concept of the commutation matrix to commutation tensor and use the commutation tensor to achieve the ...
Lingling He, Zerong Lin, Changqing Xu
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Groups with minimax commutator subgroup [PDF]
International Journal of Group Theory, 2014 A result of Dixon, Evans and Smith shows that if $G$ is a locally (soluble-by-finite) group whose proper subgroups are (finite rank)-by-abelian, then $G$ itself has this property, i.e. the commutator subgroup of~$G$ has finite rank.
Francesco de Giovanni, Trombetti
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Open problems from the conference "Engel Conditions in Groups" held in Bath, UK, 2019 [PDF]
International Journal of Group Theory, 2020 Here is list of open problems from the conference Engel Type Conditions in Groups in Bath that was held in April 2019.
Edited by Gunnar Traustason
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Recognition of Acoustic Signals of Commutator Motors
Applied Sciences, 2018 Most faults can stop a motor, and time is lost in fixing the damaged motor. This is a reason why it is essential to develop fault-detection methods. This paper describes the acoustic-based fault detection of two commutator motors: the commutator motor of
A. Głowacz
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The structure of groups with cyclic commutator subgroups indecomposable to a subdirect product of groups [PDF]
Известия Саратовского университета. Новая серия. Серия Математика. Механика. Информатика, 2021 The article studies finite groups indecomposable to subdirect product of groups (subdirectly irreducible groups), commutator subgroups of which are cyclic subgroups.
Kozlov, Vladimir Anatolievich +1 more
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Journal of Inequalities and Applications, 2016 The purpose of this paper is to investigate the weighted estimates of commutators generated by BMO-functions and the fractional integral operator on Morrey spaces. The main result generalizes the Sawano, Sugano, and Tanaka result to a weighted setting.
Takeshi Iida
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