Results 31 to 40 of about 3,739,334 (352)

A Coordinate Transformation for Unsteady Boundary Layer Equations [PDF]

open access: yesINCAS Bulletin, 2011
This paper presents a new coordinate transformation for unsteady, incompressible boundary layer equations that applies to both laminar and turbulent flows. A generalization of this coordinate transformation is also proposed.
Paul G. A. CIZMAS
doaj   +1 more source

Research on the Hand–Eye Calibration Method of Variable Height and Analysis of Experimental Results Based on Rigid Transformation

open access: yesApplied Sciences, 2022
In view of the phenomenon that camera imaging will appear large up close and small from afar in the eye-to-hand hand-calibration system, one hand–eye calibration is carried out.
Shaohui Su   +3 more
doaj   +1 more source

Cylindrical Superlens by a Coordinate Transformation

open access: yes, 2008
Cylinder-shaped perfect lens deduced from the coordinate transformation method is proposed. The previously reported perfect slab lens is noticed to be a limiting form of the cylindrical lens when the inner radius approaches infinity with respect to the ...
J. B. Pendry, Min Qiu, Min Yan, Wei Yan
core   +1 more source

The Minkowski metric in non-inertial observer radar coordinates

open access: yes, 2004
We give a closed expression for the Minkowski (1+1)-dimensional metric in the radar coordinates of an arbitrary non-inertial observer O in terms of O's proper acceleration.
Born M.   +10 more
core   +1 more source

Metamaterial Electromagnetic Superabsorber with Arbitrary Geometries

open access: yesEnergies, 2010
The electromagnetic superabsorber that has larger absorption cross section than its real size may be a novel photothermal device with improved solar energy conversion rates.
Jingjing Yang   +4 more
doaj   +1 more source

Hybrid Mode Control of an Asymmetric Dual Three-Phase Synchronous Motor Under Single-Phase Open Fault

open access: yesIEEE Access, 2022
This paper proposes hybrid mode control for an asymmetric dual three-phase synchronous motor (ADTP-SM) with separated neutral points in a single-phase open-fault situation. The fault-tolerant control is classified into the maximum torque mode and minimum
Dong-Kyun Son   +4 more
doaj   +1 more source

Solving Einstein's Equations With Dual Coordinate Frames [PDF]

open access: yes, 2006
A method is introduced for solving Einstein's equations using two distinct coordinate systems. The coordinate basis vectors associated with one system are used to project out components of the metric and other fields, in analogy with the way fields are ...
E. D. Sontag   +8 more
core   +3 more sources

A general transformation formula for conformal fields

open access: yes, 1994
An explicit transformation formula for chiral conformal fields under arbitrary holomorphic coordinate transformations is established. As an application I calculate the transformation law of the general quasiprimary field at level 4.Comment: 8 pages ...
Belavin   +3 more
core   +1 more source

Linear spin wave theory for single-Q incommensurate magnetic structures [PDF]

open access: yes, 2015
Linear spin wave theory provides the leading term in the calculation of the excitation spectra of long-range ordered magnetic systems as a function of $1/\sqrt{S}$. This term is acquired using the Holstein-Primakoff approximation of the spin operator and
Lake, B., Toth, S.
core   +3 more sources

Integral Control of Port-Hamiltonian Systems: Nonpassive Outputs Without Coordinate Transformation [PDF]

open access: yesIEEE Transactions on Automatic Control, 2017
In this paper we present a method for the addition of integral action to nonpassive outputs of a class of port-Hamiltonian (pH) systems. The proposed integral controller is a dynamic extension, constructed from the open-loop system, such that the closed ...
Joel Ferguson, A. Donaire, R. Middleton
semanticscholar   +1 more source

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