Results 21 to 30 of about 1,038,620 (334)

Noncompact harmonic manifolds [PDF]

open access: yes, 2013
The Lichnerowicz conjecture asserts that all harmonic manifolds are either flat or locally symmetric spaces of rank 1. This conjecture has been proved by Z.I. Szabo for harmonic manifolds with compact universal cover. E. Damek and F.
Knieper, Gerhard, Peyerimhoff, Norbert
core   +2 more sources

Analysis and research on energy utilization efficiency of port portal crane [PDF]

open access: yesE3S Web of Conferences, 2022
Portal crane is one of the important equipment of bulk terminal, which is specially used for shore loading and unloading operation. It mainly consumes electric energy.
Liu Leilei, Guan Kun, Wu Peisen
doaj   +1 more source

Experimental observation of second-harmonic generation and diffusion inside random media [PDF]

open access: yes, 2009
We have experimentally measured the distribution of the second-harmonic intensity that is generated inside a highly-scattering slab of porous gallium phosphide. Two complementary techniques for determining the distribution are used.
Ad Lagendijk   +25 more
core   +2 more sources

Bases of exponents with a piecewise linear phase in generalized weighted Lebesgue space

open access: yesJournal of Inequalities and Applications, 2016
The perturbed system of exponents with a piecewise linear phase, consisting of eigenfunctions of a discontinuous differential operator, is considered in this work.
Tofig Najafov   +2 more
doaj   +1 more source

Time-domain Dynamic State Estimation for Unbalanced Three-phase Power Systems

open access: yesJournal of Modern Power Systems and Clean Energy, 2023
In this paper, we present a time-domain dynamic state estimation for unbalanced three-phase power systems. The dynamic nature of the estimator stems from an explicit consideration of the electromagnetic dynamics of the network, i.e., the dynamics of the ...
Martin Pfeifer   +5 more
doaj   +1 more source

Eigenvalues and entropies under the harmonic-Ricci flow [PDF]

open access: yes, 2013
In this paper, the author discusses the eigenvalues and entropies under the harmonic-Ricci flow, which is the Ricci flow coupled with the harmonic map flow. We give an alternative proof of results for compact steady and expanding harmonic-Ricci breathers.
Li, Yi
core   +2 more sources

Harmonic Causation and Harmonic Echoes [PDF]

open access: yesNature, 1873
IN reference to the question of “Harmonic Echoes,” allow me to suggest to those who may have the opportunity of observation, how desirable it is that these echo-tones should be investigated in a manner to determine whether they are truly harmonic or not. There would be no difficulty in testing the sounds given in response to the notes of a closed organ-
openaire   +2 more sources

Subclasses of Noshiro-Type Starlike Harmonic Functions Involving q-Srivastava–Attiya Operator

open access: yesMathematics, 2023
In this paper, the harmonic function related to the q-Srivastava–Attiya operator is described to introduce a new class of complex harmonic functions that are orientation-preserving and univalent in the open-unit disk. We also cover some important aspects
Gangadharan Murugusundaramoorthy   +3 more
doaj   +1 more source

Harmonic Superspaces from Superstrings [PDF]

open access: yes, 2004
We derive harmonic superspaces for N=2,3,4 SYM theory in four dimensions from superstring theory. The pure spinors in ten dimensions are dimensionally reduced and yield the harmonic coordinates.
Grassi, P. A., van Nieuwenhuizen, P.
core   +2 more sources

Quality Assessment of HDR/WCG Images Using HDR Uniform Color Spaces

open access: yesJournal of Imaging, 2019
High Dynamic Range (HDR) and Wide Color Gamut (WCG) screens are able to render brighter and darker pixels with more vivid colors than ever. To assess the quality of images and videos displayed on these screens, new quality assessment metrics adapted to ...
Maxime Rousselot   +3 more
doaj   +1 more source

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