The local equilibrium approach previously developed by the Authors [J. Mabillard and P. Gaspard, J. Stat. Mech. (2020) 103203] for matter with broken symmetries is applied to crystalline solids. macroscopic hydrodynamics of crystals their thermodynamic transport properties are deduced from microscopic Hamiltonian dynamics. In particular, Green-Kubo formulas obtained all coefficients. eight hydr...

in the current study the effect of casimir force and squeezed film damping on the pull-in instability and dynamic behavior of electrostatically actuated nano and micro electromechanical systems is investigated separately. linear elastic membrane theory is used to model the static and dynamic behavior of system for strip, annular and disk geometries. squeezed film damping effect is modeled using...

Time-domain coherent Raman techniques have been utilized to selectively measure ultrafast decay rates of optical phonons in cubic BaSnO 3 perovskite. Measurements were made within a 350–1300 [Formula: see text] frequency range with time and equivalent spectral resolution ∼120 fs less than 0.1 text], respectively. The phonon mode damping are found be 1.27–1.59 at room temperature, indicating tha...

Expositions of the Euler equations for rotation a rigid body often invoke idea specially damped system whose energy dissipates while its angular momentum magnitude is conserved in frame. An attempt to explicitly construct such damping function leads more general, but still integrable, cubic trajectories are confined nested sets quadric surfaces space. For some choices parameters, lines fixed po...

This paper presents the use of spike-and-slab (SS) priors for discovering governing differential equations motion nonlinear structural dynamic systems. The problem is cast as that selecting relevant variables from a predetermined dictionary basis and solved via sparse Bayesian linear regression. SS priors, which belong to class discrete-mixture are known their strong sparsifying (or shrinkage) ...

To facilitate the damping matching of dampers for vehicle passive suspensions, this paper proposes an analytical matching method of the optimal piecewise linear damping characteristics curve. Based on the vehicle vibration model, taking the suspension dynamic deflection as the constraint, by the vibration acceleration and the wheel dynamic load, an objective function about the relative damping ...

In this paper, following a two-stage methodology, the differential quadrature element (DQE) model of a three-story frame structure is updated for the vibration analysis. In the first stage, the mass and stiffness matrices are updated using the experimental natural frequencies. Then, having the updated mass and stiffness matrices, the structural damping matrix is updated to minimize the error be...

the interline power flow controller (ipfc) is a concept of the facts controller for series compensation which can inject a voltage with controllable magnitude and phase angle among multi lines. this paper proposes a novel ipfc-based damping neuro-control scheme using pso for damping oscil la t i o ns in a power system to improve power system stability. the add i tion of a supplementary controll...

We report on a systematic comparative study of the spin Hall efficiency between highly face-centered cubic (fcc)-textured Pt–Al alloy films grown MgO(001) and poorly crystallized SiO2. Using CoFeB as detector, we show that for Al compositions centering around x = 25, mainly L12-ordered Pt100−xAlx MgO exhibit outstanding charge-spin conversion efficiency. For Pt78Al22/CoFeB bilayer MgO, obtain d...