نتایج جستجو برای: parametric excitation

تعداد نتایج: 123362  

2014
Michal Marszal Krzysztof Jankowski Przemyslaw Perlikowski Tomasz Kapitaniak

This paper investigates dynamics of double pendulum subjected to vertical parametric kinematic excitation. It includes detailed bifurcation diagrams in two parameters space (excitation's frequency and amplitude) for both oscillations and rotations in the domain of periodic solutions.

Journal: :Optics express 2013
Christian Homann Markus Breuer Frank Setzpfandt Thomas Pertsch Eberhard Riedle

Optical parametric amplifiers are typically seeded with either parametric superfluorescence or broadband continuum pulses. We show both with picosecond and femtosecond pump pulses, that single longitudinal mode cw lasers with mW power can be well used to generate nearly Fourier-transform-limited output pulses. The 532 nm pumped picosecond system is seeded in the near infrared and fully tunable ...

Journal: :Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy 2007
Achamma Kurian Sajan D George C V Bindhu V P N Nampoori C P G Vallabhan

The effect of pH on the fluorescence efficiency of fluorescein is evaluated using thermal lens technique. Fluorescence efficiency increases as the sample becomes more and more alkaline. But when fluorescein is mixed with rhodamine B fluorescence quenching of fluorescein takes place with the excitation of rhodamine B. The electronic energy transfer in this mixture is investigated using Optical P...

2016
Maryam Ghandchi Tehrani Vincenzo Gattulli

In this paper, a dynamical system, which consists of two linear mechanical oscillators, coupled with a nonlinear damping device is considered. First, the dynamic equations are derived, then, an analytical method such as harmonic balance method, is applied to obtain the response to a harmonic base excitation. The response of the system depends on the excitation characteristics. A parametric stud...

Journal: :TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C 1990

Journal: :TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C 1990

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