A/D converters used in instrumentation and measurements often require high absolute accuracy, including high linearity and negligible DC offset. The incremental (or integrating) converter provides a solution for such measurement applications, as it has all the advantages of the ∆Σ (Delta-Sigma) converter, yet is capable of offset-free and accurate conversion. In this conference paper, theoretic...

A Liapunov type stability theory for high order systems of differential equations is developed. This is done by reduction to the classical case, using the theory of polynomial models.

Lattice QCD simulations are routinely done nowadays using highly-improved actions, which are designed to remove the leading errors arising from the discretization of the continuum theory. Improved actions can be designed from both perturbative and nonperturbative considerations. In this review I describe techniques for doing the higher-order perturbation theory (PT) calculations that are necess...

Using the infinitesimal theory of elasticity and analytical formulation, displacements and stresses based on the high-order shear deformation theory (HSDT) is presented for axisymmetric thick-walled cylinders made of functionally graded materials under internal and/or external uniform pressure. The material is assumed to be isotropic heterogeneous with constant Poisson’s ratio and radially varyi...

in this paper, free vibration of functionally graded rectangular simply supported thick plates based on two variable refined plate theory is presented. according to a power-law distribution, the mass density and elasticity modulus of the plate are considered to vary while poisson’s ratio is constant. in order to extract the five constitutive equations of motion, hamilton principle is employed. ...