Femtosecond and picosecond operating regimes of an argon-ion-pumped Cr(3+):LiSrAlF(6) laser, passively mode locked using a saturable absorber, are described. At low absorber concentrations, self-starting cw mode locking is demonstrated, which yields pulses as short as 33 fs after extracavity prism compensation. At higher concentrations, both cw mode-locked and Q-switched mode-locked operation i...

This paper dis cusses the development of a nonlinear shock absorber model for low-frequency CAE-NVH applications of body-on-frame vehicles. In CAE simulations, the shock absorber is represented by a linear damper model and is found to be inadequate in capturing the dynamics of shock absorbers. In particular, this model neither captures nonlinear behavior of shock absorbers nor distinguishes bet...

A model-free algorithm is developed for the reactive control of a wave energy converter. Artificial neural networks are used to map the significant wave height, wave energy period, and the power take-off damping and stiffness coefficients to the mean absorbed power and maximum displacement. These values are computed during a time horizon spanning multiple wave cycles, with data being collected ...

Absorption of wave energy may be considered as a phenomenon of interference between incident and radiated waves generated by an oscillating object; a wave-energy converter (WEC) that displaces water. If a WEC is very small in comparison with one wavelength, it is classified as a point absorber (PA); otherwise, as a 'quasi-point absorber'. The latter may be a dipole-mode radiator, for instance a...

Reducing absorber layer thickness below 500 nm in regular Cu(In,Ga)Se2 (CIGS) solar cells decreases cell efficiency considerably, as both short-circuit current and open-circuit voltage are reduced because of incomplete absorption and high Mo/CIGS rear interface recombination. In this work, an innovative rear cell design is developed to avoid both effects: a highly reflective rear surface passiv...

The purpose of this study is to develop a circuit for an automobile air conditioner, which will reduce the consumption power developed by engine. This paper proposes design absorption conditioner. A description principle operation conditioner operating on cycle one-stage refrigeration machine has been given in paper. It consists stripper (generator), condenser, absorber, evaporator. Lithium bro...

This work presents the Water Energy Point Absorber (WEPA), which is a heaving single-buoy point absorber optimized for specific site off west coast of Sardinia Island. The aim study to present optimization process undertaken identify best configuration in terms performance and cost. carried out thanks simulation tool developed Matlab-Simulink environment verified through commercial software Orc...

To ensure a reliable operation over the life time of wave energy converters (WECs), number load cases need to be considered according international standards for marine structures determine an optimal design. This paper outlines procedure obtaining environmental design line force 1:30 scaled point-absorber WEC using contour with 50-year return period Dowsing site in North Sea. obtain response d...