Results 41 to 50 of about 348,565 (319)

A High Power Quality Buck-H Auxiliary Power Converter in Railway Applications

open access: yesFrontiers in Energy Research, 2022
DC voltage utilization and AC voltage harmonics are important evaluation indexes for Auxiliary Power Converter in Railway Applications. To improve the above two indicators, a novel switch-mode modulation method and quasi-PR control strategy for Buck-H ...
Zheng Lan   +6 more
doaj   +1 more source

Harmonic conjugation in harmonic matroids

open access: yesDiscrete Mathematics, 2009
This paper was finished in 2008.
openaire   +2 more sources

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   +3 more sources

Fast-individual-harmonic-extraction technique

open access: yes, 2005
One outcome of a PhD project (C H Ng, University studentship) A collaborative work (the Energy Systems Group, Northumbria and Durham University). It deals with the problem of harmonic suppression or elimination in power systems for safety and power ...
Busawon, Krishna   +3 more
core   +1 more source

Analysis of arbitrary tooth profiles of cylindrical gears using normal polar coordinates (Application to the generation of a gear tooth profile by a given tooth profile of rack cutter and its interference problem)

open access: yesJournal of Advanced Mechanical Design, Systems, and Manufacturing
Various coordinate systems have been used in tooth profile analysis for cylindrical gears. An effective approach to tooth profile expression using normal polar coordinates is proposed.
Yuya MURAYAMA   +3 more
doaj   +1 more source

Heartbeat Harmonics Detectability During Driving Simulation Using NHA and CW Doppler Radar

open access: yesIEEE Access, 2023
Several studies have been published on noncontact heartbeat detection recently. Particularly, a few studies have found that radar for noncontact detection is effective for long-term monitoring.
Taichi Horimoto   +8 more
doaj   +1 more source

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

An approach to harmonic load- and source-pull measurements for high-efficiency PA design [PDF]

open access: yes, 2004
High-efficiency power-amplifier design requires numerous efforts to investigate both input and output harmonic terminations effects. A simplified theoretical approach to clarify the relevance of such terminations is presented here, and design criteria to
Ernesto Limiti   +18 more
core   +1 more source

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

European Standard Clinical Practice Guideline and EXPeRT Recommendations for the Diagnosis and Management of Gastroenteropancreatic Neuroendocrine Neoplasms in Children and Adolescents

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen   +23 more
wiley   +1 more source

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