Results 41 to 50 of about 1,109,117 (311)

Coupling microstrip line bandpass filter applied to hybrid frequency synthesizers

open access: yesDianzi Jishu Yingyong, 2018
This paper designs a parallel coupled microstrip bandpass filter at the ends of the hybrid frequency synthesizer of PLL+DDS mixing in the outside of the feedback loop systems. This filter is used to suppress the frequency synthesizer′s spurs and harmonic
Chai Xiaorong   +2 more
doaj   +1 more source

Capturing Long-Range Dependence and Harmonic Phenomena in 24-Hour Solar Irradiance Forecasting: A Quantile Regression Robustification via Forecasts Combination Approach

open access: yesIEEE Access, 2020
The global horizontal irradiance data recorded at the earth's horizontal surface is a mixture of deterministic (extra-terrestrially) and stochastic components due to the ever-changing atmospheric conditions. The Box-Jenkins short memory stochastic models
Edmore Ranganai, Caston Sigauke
doaj   +1 more source

Damper Winding for Noise and Vibration Reduction of a Permanent Magnet Synchronous Machine

open access: yesSensors, 2022
In this paper, a passive method for the noise reduction of the PMSM (Permanent Magnet Synchronous Machine) is presented. The principle is to add an auxiliary three-phase winding into the same slots as the initial stator winding, short-circuited via three
Sijie Ni   +4 more
doaj   +1 more source

Reflection identities of harmonic sums of weight four

open access: yes, 2018
We consider the reflection identities for harmonic sums at weight four. We decompose a product of two harmonic sums with mixed pole structure into a linear combination of terms each having a pole at either negative or positive values of the argument. The
Prygarin, Alex
core   +1 more source

Super-harmonic injection locking of nano-contact spin-torque vortex oscillators

open access: yes, 2016
Super-harmonic injection locking of single nano-contact (NC) spin-torque vortex oscillators (STVOs) subject to a small microwave current has been explored. Frequency locking was observed up to the fourth harmonic of the STVO fundamental frequency $f_{0}$
Dürrenfeld, P.   +6 more
core   +1 more source

The Approximation of Harmonic Functions by Harmonic Polynomials and by Harmonic Rational Functions [PDF]

open access: yesBulletin of the American Mathematical Society, 1929
which converges uniformly f or all values of 6. This is of course a general fact, tha t if a given function can be uniformly approximated as closely as desired by a linear combination of other functions, then that function can be expanded in a uniformly convergent series of which each term is a linear combination of those other functions, and ...
openaire   +4 more sources

On harmonic Boehmians [PDF]

open access: yesProceedings of the American Mathematical Society, 1989
Existence of generalized functions (called Boehmians) satisfying the Laplace equation which are not C ∞ {C^\infty } -functions is proved.
openaire   +4 more sources

Leveraging multiple data types for improved compound-kinase bioactivity prediction

open access: yesNature Communications
Machine learning provides efficient ways to map compound-kinase interactions. However, diverse bioactivity data types, including single-dose and multi-dose-response assay results, present challenges.
Ryan Theisen   +4 more
doaj   +1 more source

Harmonics and Reduction of Energy Consumption in Lighting Systems by Using LED Lamps

open access: yesEnergies, 2018
This paper proposes the study and analysis of harmonics, energy consumption and power quality of light emitting diode (LED) lamps equipped in building lighting systems.
Natthanon Phannil   +2 more
doaj   +1 more source

Second Harmonic Coherent Driving of a Spin Qubit in a Si/SiGe Quantum Dot

open access: yes, 2015
We demonstrate coherent driving of a single electron spin using second harmonic excitation in a Si/SiGe quantum dot. Our estimates suggest that the anharmonic dot confining potential combined with a gradient in the transverse magnetic field dominates the
Coppersmith, S. N.   +8 more
core   +1 more source

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