scholarly journals Aerodynamic Analysis of Cup Anemometers Performance: The Stationary Harmonic Response

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Santiago Pindado ◽  
Javier Cubas ◽  
Ángel Sanz-Andrés
Keyword(s):  
Transfer Function ◽  
Harmonic Analysis ◽  
Rotational Speed ◽  
Shape Parameters ◽  
New Approach ◽  
Third Harmonic ◽  
Harmonic Response ◽  
The Third ◽  
Harmonic Term ◽  
Cup Anemometer

The effect of cup anemometer shape parameters, such as the cups’ shape, their size, and their center rotation radius, was experimentally analyzed. This analysis was based on both the calibration constants of the transfer function and the most important harmonic term of the rotor’s movement, which due to the cup anemometer design is the third one. This harmonic analysis represents a new approach to study cup anemometer performances. The results clearly showed a good correlation between the average rotational speed of the anemometer’s rotor and the mentioned third harmonic term of its movement.

Harmonic Analysis of a Triductor — Part 1

1975 ◽  
Vol 12 (2) ◽  
pp. 129-134
Author(s):  
I. K. Puri
Keyword(s):  
Harmonic Analysis ◽  
Wave Form ◽  
Third Harmonic ◽  
The Third ◽  
Control Current ◽  
Current Wave ◽  
Secondary Voltage ◽  
Transformer Core ◽  
Secondary Power

The third harmonic present in the voltage or current wave-form of a transformer is utilized for the heating of induction furnaces. The secondary power at 150 cycles is controlled with d.c. magnetization of the transformer core. The circuit used shows a different type of B-H curve. This paper explains how this magnetizing curve gives the variation of secondary voltage by changing d.c. control current.

scholarly journals Ultrafast Third-Order Nonlinear Optical Response Excited by fs Laser Pulses at 1550 nm in GaN Crystals

Materials ◽  
2021 ◽  
Vol 14 (12) ◽  
pp. 3194
Author(s):  
Adrian Petris ◽  
Petronela Gheorghe ◽  
Tudor Braniste ◽  
Ion Tiginyanu
Keyword(s):  
Harmonic Generation ◽  
Nonlinear Optical ◽  
Laser Pulses ◽  
Third Harmonic Generation ◽  
High Repetition Rate ◽  
Third Order ◽  
Third Harmonic ◽  
The Third ◽  
High Repetition ◽  
Gan Crystal

The ultrafast third-order optical nonlinearity of c-plane GaN crystal, excited by ultrashort (fs) high-repetition-rate laser pulses at 1550 nm, wavelength important for optical communications, is investigated for the first time by optical third-harmonic generation in non-phase-matching conditions. As the thermo-optic effect that can arise in the sample by cumulative thermal effects induced by high-repetition-rate laser pulses cannot be responsible for the third-harmonic generation, the ultrafast nonlinear optical effect of solely electronic origin is the only one involved in this process. The third-order nonlinear optical susceptibility of GaN crystal responsible for the third-harmonic generation process, an important indicative parameter for the potential use of this material in ultrafast photonic functionalities, is determined.

scholarly journals How to Solve the Problem of Evil

2019 ◽  
Vol 36 (4) ◽  
pp. 442-462 ◽  
Author(s):  
Justin Mooney ◽  
Keyword(s):  
Problem Of Evil ◽  
New Approach ◽  
Gratuitous Evil ◽  
The Third ◽  
The Problem Of Evil ◽  
Argument From Evil

One paradigmatic argument from evil against theism claims that (1) if God exists, then there is no gratuitous evil. But (2) there is gratuitous evil, so (3) God does not exist. I consider three deontological strategies for resisting this argument. Each strategy restructures existing theodicies which deny (2) so that they instead deny (1). The first two strategies are problematic on their own, but their primary weaknesses vanish when they are combined to form the third strategy, resulting in a promising new approach to the problem of evil.

The third harmonic generated voltage by salient-pole synchronous generator during 3-phase-to-ground fault

2017 ◽  
Vol 27 (11) ◽  
pp. e2401
Author(s):  
Nur Iylia Shah Riman ◽  
Mohd Faris Abdullah ◽  
Mohd Fakhizan Romlie ◽  
Zuhairi Baharudin
Keyword(s):  
Synchronous Generator ◽  
Third Harmonic ◽  
The Third ◽  
Ground Fault ◽  
Salient Pole
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