Results 41 to 50 of about 1,038,620 (334)

A Review: Recent Progress in the Design and Development of Nonlinear Radars

open access: yesRemote Sensing, 2021
This paper presents an extensive review of nonlinear response-based radar systems. Nonlinear radars are generally used for clutter suppression purposes. These radars detect the nonlinear response generated by diodes and transistors are used as a tag for ...
Ashish Mishra, Changzhi Li
doaj   +1 more source

Some Properties of Certain Multivalent Harmonic Functions

open access: yesMathematics, 2023
In this paper, various features of a new class of normalized multivalent harmonic functions in the open unit disk are analyzed, including bounds on coefficients, growth estimations, starlikeness and convexity radii.
Georgia Irina Oros   +2 more
doaj   +1 more source

On an atomic decomposition in Banach spaces [PDF]

open access: yesSahand Communications in Mathematical Analysis, 2018
An atomic decomposition is considered in Banach space.  A method for constructing an atomic decomposition of Banach  space, starting with atomic decomposition of  subspaces  is presented. Some relations between them are established.
Telman Gasymov, Chingiz Hashimov
doaj  

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

Harmonic conjugation in harmonic matroids

open access: yesDiscrete Mathematics, 2009
This paper was finished in 2008.
openaire   +3 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   +4 more sources

Harmonic analysis of harmonic functions in the plane [PDF]

open access: yesProceedings of the American Mathematical Society, 1976
A continuous function on the complex plane is harmonic if and only if the span of its compositions with entire functions is not dense in the space of continuous functions in the topology of uniform convergence on compact sets.
openaire   +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

Dual-Frequency Piezoelectric Transducers for Contrast Enhanced Ultrasound Imaging

open access: yesSensors, 2014
For many years, ultrasound has provided clinicians with an affordable and effective imaging tool for applications ranging from cardiology to obstetrics.
K. Heath Martin   +7 more
doaj   +1 more source

Infinity-harmonic maps and morphisms

open access: yes, 2011
We propose a new notion called \emph{infinity-harmonic maps}between Riemannain manifolds. These are natural generalizations of the well known notion of infinity harmonic functions and are also the limiting case of $p$% -harmonic maps as $p\to \infty $.
Ou, Ye-Lin   +2 more
core   +2 more sources

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