in this paper, nonlinear vibration and instability response of an embedded pipe conveying viscose fluid is investigated. the pipe is considered as a timoshenko beam embedded on an elastic foundation which is simulated by spring constant of the winkler-model and the shear constant of the pasternak-model. the external flow force, acting on the beam in the direction of the flexural displacement is...

Variable selection via penalized estimation is appealing for dimension reduction. For penalized linear regression, Efron, et al. (2004) introduced the LARS algorithm. Recently, the coordinate descent (CD) algorithm was developed by Friedman, et al. (2007) for penalized linear regression and penalized logistic regression and was shown to gain computational superiority. This paper explores...

Spanwise wall oscillation is an easily implemented active control scheme. It can delay the transition to turbulent flows in incompressible boundary layers under appropriate parameters. However, this delayed compressible has not yet been confirmed numerically. In paper, we perform a series of direct numerical simulations spatially developing subsonic layer with different spanwise periods and amp...

Purpose  The aim of this study was to compare the accuracy of the coracoid bone graft placement with the open Latarjet-Patte and arthroscopic Latarjet (arthro-Latarjet) procedures in the treatment of anterior instability of the shoulder. Methods  Forty-six patients affected by anterior shoulder instability were divided into two groups. In group A ( n  = 25), patients were operated by arthroscop...

We review the magneto-structural properties of electron–electron correlated quasi-one- dimensional (1D) molecular organics. These weakly localized quarter-filled metallic-like systems with pronounced spin 1/2 antiferromagnetic (AF) interactions in stack direction exhibit a charge decoupling where magnetoelastic coupling picks up to pair into S = 0 singlet dimers. This is well illustrated by obs...

This paper is devoted to the simulation of compressible magnetohydrodynamic (MHD) flows with Lattice Boltzmann Method (LBM). The usual LBM limited low-Mach flows. We propose a robust and accurate numerical method based on vectorial kinetic construction [5,25], which allows us extend arbitrary Mach also explain how adjust viscosity in order obtain stable results smooth or discontinuous parts flo...

Kalman filters are widely used for estimating the state of a system based on noisy or inaccurate sensor readings, example in control and navigation vehicles robots. However, numerical instability modelling errors may lead to divergence filter, leading erroneous estimations. Establishing robustness against such issues can be challenging. We propose novel formal verification techniques software p...