Results 271 to 280 of about 34,963 (304)

Higher Harmonic Generation Microscopy

2005
Higher harmonic-generation, including second harmonic generation and third harmonic generation, leaves no energy deposition to the interacted matters due to its virtual-level transition characteristic, providing a truly non-invasive modality and is ideal for in vivo imaging of live specimens without any preparation.
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Higher harmonics in the Josephson effect

Physics Letters A, 1980
Abstract In the low temperature regime where macroscopic flux tunneling allows a SQUID magnetometer to follow the stable thermodynamic free energy without hysteretic dissipation, it is possible to exhibit macroscopic quantum behaviour via higher Josephson harmonic oscillations in the thermal response.
A. Widom, T.D. Clark, G. Megaloudis
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Decomposing magnetic fields into their higher harmonics

Proceedings of the American Institute of Electrical Engineers, 1915
When it is necessary to decompose a magnetic field into its higher harmonics the same methods used for analyzing current and voltage waves may be employed. In many cases, however, the usual long mathematical operations can be avoided by representing the field shapes as geometrical figures, such as triangles, rectangles, trapezoids, etc., all of which ...
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Scatter at Higher Harmonics

2001
The oscillation of gas bubbles is known to be highly nonlinear for moderate driving pressure amplitudes [87]. “Moderate amplitude” means amplitude between 100 and 500 kPa, amplitudes that occur frequently in diagnostic ultrasound imaging. The nonlinear oscillations cause the bubbles to radiate sound at harmonics of the driving acoustic pressure pulse.
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On the higher orders of hyperspherical harmonics

Journal of Mathematical Physics, 1983
We suggest a procedure to evaluate matrix elements between hyperspherical harmonics of any order. The method is based on the hyperspherical expansion of a Slater determinant constructed with oscillator wavefunctions. Explicit formulas are given for all matrix elements up to order Lm+2.
E. Arribas, J. Navarro, M. Fabre de la Ripelle   +2 more
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Higher Harmonic Rotor Control

Aircraft Engineering and Aerospace Technology, 1958
The elimination of the retreating blade stall speed limitation for helicopters by means of an appropriately programmed feathering input is studied for the general case of a rigid flapping blade with hinge constraint (thus making the results applicable to conventional, offset‐hinged or cantilevered rotor blades).
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Moiré and higher grating harmonics

Journal of the Optical Society of America, 1975
The conditions for and formation of low-spatial-frequency beat patterns between superposed grid structures are studied. The application of moire techniques for Fourier analysis of incoherently illuminated distributions is demonstrated. The different multiples of the fundamental spatial frequency of a grating are used to form distinguishable moire ...
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Nonlinear Impedances (Higher Harmonics)

2013
When linear electrical elements are used in circuits, the measured impedances are independent of the amplitude of the ac perturbation. However, in electrochemistry, the electrical equivalent parameters related to the kinetics, diffusion, and other aspects are nonlinear because the current is a nonlinear function of the applied potential. In such cases,
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Modelling and prediction of current harmonics generated by power converters in distribution networks

IET Generation, Transmission and Distribution, 2021
Arash Moradi, Jalil Yaghoobi, Abdulrahman Alduraibi   +2 more
exaly  

Nonlinear pseudo-force in a breathing crack to generate harmonics

Journal of Sound and Vibration, 2021
Wei Xu, Zhongqing Su, Maciej Radzienski   +2 more
exaly