In this study, BaZr1-xCoxO3 nanoparticles, x = 0.00, 0.04, 0.06, 0.08, 0.10 and 0.20, are synthesized through co-precipitation method. Therefore, structural, optical and magnetic properties have been investigated. The cubic perovskite structure is confirmed by X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopic measurements. The average crystallite size and micro strain ...

In the present paper the behavior of an elastically mounted cylinder in low and high mass-damping ratio is investigated. For high mass-damping ratio, a classical wake oscillator model is used. At the first, by neglecting all damping and nonlinear terms of this model, the possibility of using a linear model for determination of the lock-in range and the dominant mode is investigated. Then, w...

Duffing harmonic oscillator is a common model for nonlinear phenomena in science and engineering. This paper presents He´s Energy Balance Method (EBM) for solving nonlinear differential equations. Two strong nonlinear cases have been studied analytically. Analytical results of the EBM are compared with the solutions obtained by using He´s Frequency Amplitude Formulation (FAF) and numerical solu...

The potential function of Lippincott and Schroeder for linear hydrogen bond has been re-examined and extended to nonlinear hydrogen bond. The parameters originally introduced to the potential function by Lippincott and Schroeder have been determined from the structural parameters such as 0.. .Odistance 0-H bond distance, H.. .O distance and HOO angle. Thevalidity of harmonic oscillator appr...

A laser model is formulated in terms of quantum harmonic oscillators. Emitters the low lasing states are usual oscillators, and emitters upper inverted Diffusion coefficients, consistent with necessary for solving nonlinear equations analytically, found. Photon number fluctuations mode population calculated. Collective Rabi splitting peaks predicted intensity fluctuation spectra superradiant la...

This paper suggests a procedure for estimating excursion probabilities for linear and nonlinear systems subjected to Gaussian excitation processes. The stochastic excitation process is modeled most generally by the Karhunen-Loève expansion. The approach is based on the so called “averaged excursion probability flow” which allows for a simple solution for the interaction in excursion problems. S...

This paper proposes a procedure for the parameter identification of Tamura’s wake-oscillator model. A multiple timescale analysis dimensionless model shows that response is governed by two groups D0 and D1, highlighting importance forcing terms in governing equations, total (aerodynamic structural) damping coefficient ? fluid Van der Pol oscillator. In particular, this approach provides simple ...