Articles with "harmonics" as a keyword



Influence of parameterized small‐scale gravity waves on the migrating diurnal tide in Earth's thermosphere

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Published in 2017 at "Journal of Geophysical Research"

DOI: 10.1002/2017ja024089

Abstract: Effects of subgrid-scale gravity waves (GWs) on the diurnal migrating tides are investigated from the mesosphere to the upper thermosphere for September equinox conditions, using a general circulation model coupled with the extended spectral nonlinear… read more here.

Keywords: gravity waves; correlation; harmonics; scale gravity ... See more keywords

Plasmon‐Enhanced Circular Polarization High‐Harmonic Generation from Silicon

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Published in 2024 at "Advanced Optical Materials"

DOI: 10.1002/adom.202401478

Abstract: High harmonics of circular polarization can be directly generated by monochromatic circularly polarized incident light owing to the high density and stable structure of crystal media. If the arrangement of multiple coplanar atoms in the… read more here.

Keywords: plasmon enhanced; high harmonic; high harmonics; circular polarization ... See more keywords

Nonlinear Harmonics: A Gateway to Enhanced Image Contrast and Material Discrimination

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Published in 2025 at "Advanced Science"

DOI: 10.1002/advs.202411556

Abstract: Recent advancements in atomic force microscopy (AFM) have enabled detailed exploration of materials at the molecular and atomic levels. These developments, however, pose a challenge: the data generated by microscopic and spectroscopic experiments are increasing… read more here.

Keywords: image contrast; image; harmonics; harmonics gateway ... See more keywords

Multivariable control of two‐input and two‐output system using relay autotuning method: An experimental analysis

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Published in 2025 at "Asian Journal of Control"

DOI: 10.1002/asjc.3623

Abstract: In this paper, the improved decentralized controllers for a MIMO system are designed using the sequential and simultaneous relay autotuning method. Conventionally, the decentralized controllers are designed without including the effect of higher‐order harmonics. Few… read more here.

Keywords: higher order; relay; relay autotuning; order harmonics ... See more keywords

On the spatial and temporal shift in the archetypal seasonal temperature cycle as driven by annual and semi‐annual harmonics

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Published in 2020 at "Environmetrics"

DOI: 10.1002/env.2665

Abstract: Statistical methods are required to evaluate and quantify the uncertainty in environmental processes, such as land and sea surface temperature, in a changing climate. Typically, annual harmonics are used to characterize the variation in the… read more here.

Keywords: temperature; annual semi; cycle; semi annual ... See more keywords

The hyperellipsoidal system

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Published in 2024 at "Mathematical Methods in the Applied Sciences"

DOI: 10.1002/mma.10166

Abstract: One hundred ninety years ago, Lamé introduced the celebrated ellipsoidal system, which is an orthogonal curvilinear system that incorporates any anisotropic characteristics of three‐dimensional space. Since then, the theory of ellipsoidal harmonics has been successfully… read more here.

Keywords: system; operator; four dimensional; harmonics ... See more keywords

Impedance Mismatch Approach to Design RF Power Amplifier With Harmonic Suppression

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Published in 2025 at "Microwave and Optical Technology Letters"

DOI: 10.1002/mop.70269

Abstract: This letter presents the design of a PCB based RF power amplifier (PA) with improved harmonic suppression without the use of any external filter at the output. The proposed stepped impedance microstrip line input and… read more here.

Keywords: harmonic suppression; harmonics; power amplifier; power ... See more keywords

Thermal noise lowers the accuracy of rotationally invariant harmonics of diffusion MRI data and their robustness to experimental variations

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Published in 2025 at "Magnetic Resonance in Medicine"

DOI: 10.1002/mrm.70035

Abstract: Rotational invariants (RIs) are at the root of many dMRI applications. Among others, they are presented as a sensible way of reducing the dimensionality of biophysical models. While thermal noise impact on diffusion metrics has… read more here.

Keywords: noise lowers; thermal noise; harmonics; diffusion ... See more keywords

Directed flow from C-odd gluon correlations at small x

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Published in 2018 at "Journal of High Energy Physics"

DOI: 10.1007/jhep07(2018)140

Abstract: A bstractIt is shown that odd harmonic azimuthal correlations, including the directed flow v1, in forward two-particle production in peripheral proton-nucleus (pA) collisions can arise simply from the radial nuclear profile of a large nucleus.… read more here.

Keywords: gtmd correlator; gtmd; harmonics; gluon ... See more keywords

More on Modified Spherical Harmonics

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Published in 2019 at "Advances in Applied Clifford Algebras"

DOI: 10.1007/s00006-019-0990-z

Abstract: A modification of the classical theory of spherical harmonics is presented. The space $${\mathbb {R}}^d = \{(x_1,\ldots ,x_d)\}$$ is replaced by the upper half space $${{\mathbb {R}}}_{+}^{d}=\left\{ (x_1,\ldots ,x_d), x_d > 0 \right\} $$ ,… read more here.

Keywords: mathbb; harmonics; modified spherical; spherical harmonics ... See more keywords

Concentration Estimates for Band-Limited Spherical Harmonics Expansions via the Large Sieve Principle

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Published in 2019 at "Journal of Fourier Analysis and Applications"

DOI: 10.1007/s00041-020-09744-8

Abstract: We study a concentration problem on the unit sphere $$\mathbb {S}^2$$ S 2 for band-limited spherical harmonics expansions using large sieve methods. We derive upper bounds for concentration in terms of the maximum Nyquist density.… read more here.

Keywords: spherical harmonics; harmonics expansions; large sieve; harmonics ... See more keywords