Results 11 to 20 of about 293,198 (298)

HARMONIC POLYLOGARITHMS [PDF]

open access: yesInternational Journal of Modern Physics A, 2000
The harmonic polylogarithms (hpl's) are introduced. They are a generalization of Nielsen's polylogarithms, satisfying a product algebra (the product of two hpl's is in turn a combination of hpl's) and forming a set closed under the transformation of the arguments x=1/z and x=(1-t)/(1+t). The coefficients of their expansions and their Mellin transforms
Remiddi, Ettore   +1 more
openaire   +2 more sources

Harmonic knots [PDF]

open access: yesJournal of Knot Theory and Its Ramifications, 2016
The harmonic knot [Formula: see text] is parametrized as [Formula: see text] where [Formula: see text], [Formula: see text] and [Formula: see text] are pairwise coprime integers and [Formula: see text] is the degree [Formula: see text] Chebyshev polynomial of the first kind. We classify the harmonic knots [Formula: see text] for [Formula: see text] We
Koseleff, Pierre-Vincent, Pecker, Daniel
openaire   +4 more sources

Harmonic Alignment [PDF]

open access: yes, 2020
Published in SIAM Data Mining 2020.
Stanley III, Jay S.   +3 more
openaire   +3 more sources

Harmonic Morphisms Projecting Harmonic Functions to Harmonic Functions [PDF]

open access: yesAbstract and Applied Analysis, 2012
For Riemannian manifolds M and N, admitting a submersion ϕ with compact fibres, we introduce the projection of a function via its decomposition into horizontal and vertical components. By comparing the Laplacians on M and N, we determine conditions under which a harmonic function on U = ϕ−1(V) ⊂ M projects down, via its horizontal component, to a ...
openaire   +4 more sources

Concurrent Backscatter Streaming from Batteryless and Wireless Sensor Tags with Multiple Subcarrier Multiple Access [PDF]

open access: yes, 2017
This paper proposes a novel multiple access method that enables concurrent sensor data streaming from multiple batteryless, wireless sensor tags. The access method is a pseudo-FDMA scheme based on the subcarrier backscatter communication principle, which
Haruhisa ICHIKAWA   +4 more
core   +2 more sources

Parameter estimation of harmonics arising in electrical instruments of smart grids using cuckoo search heuristics

open access: yesFrontiers in Energy Research, 2022
The accurate estimation of power signal parameters allows smart grids to optimize power delivery efficiency, improve equipment utilization, and control power flow among generation nodes and loads.
Naveed Ahmed Malik   +7 more
doaj   +1 more source

An Adaptive Control Strategy for a Low-Ripple Boost Converter in BLDC Motor Speed Control

open access: yesPower Electronics and Drives, 2021
Conventional boost converters are widely used for connecting low-voltage power sources and inverters in motor control. However, a large filter capacitor bank is often used to reduce DC-link ripples that occur when an inverter is connected to a boost ...
Wang Haifeng, Zhang Haili
doaj   +1 more source

Chord-Conditioned Melody Harmonization With Controllable Harmonicity

open access: yesICASSP 2023 - 2023 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2023
Melody harmonization has long been closely associated with chorales composed by Johann Sebastian Bach. Previous works rarely emphasised chorale generation conditioned on chord progressions, and there has been a lack of focus on assistive compositional tools.
Wu, Shangda, Li, Xiaobing, Sun, Maosong
openaire   +2 more sources

Noise mitigation in dual three-phase internal permanent magnet machines by injection of current harmonics

open access: yesThe Journal of Engineering, 2019
Steadily increasing power demands are linked with the ongoing process of electrifying the powertrain for dominant and pure electric vehicles. Fulfilling those requirements can be achieved by a multiphase approach which is implemented with a six-phase ...
Philipp Hollstegge   +2 more
doaj   +1 more source

Three‐phase algorithm for independent single‐phase grid frequency estimation under grid disturbances

open access: yesIET Generation, Transmission & Distribution, 2023
This paper reports an algorithm for quick and precise estimation of the single‐phase grid frequency under DC offset and both odd and even harmonics. The proposed single‐phase grid frequency estimation method is derived from a three‐phase relation.
Md. Shamim Reza, Md. Maruf Hossain
doaj   +1 more source

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