The method of differential quadrature is employed to analyze the free vibration of a cracked cantilever beam resting on elastic foundation. The beam is made of a functionally graded material and rests on a Winkler-Pasternak foundation. The crack action is simulated by a line spring model. Also, the differential quadrature method with a geometric mapping are applied to study the free vibration o...

This paper extends the application of Differential Quadrature Method (DQM) for finding the numerical solution of general singularly perturbed two point boundary value problems with a boundary layer at right end point or both end point or at an internal point. The Differential Quadrature Method is an efficient descritization technique in solving initial and /or boundary value problems accurately...

Abstract This paper studies the problem of construction of optimal quadrature formulas in the sense of Sard in the space ( ) 2 (0,1) m L . In this paper the quadrature sum consists of values of the integrand and its first derivative at nodes. The coefficients of optimal quadrature formulas are found and the norm of the optimal error functional is calculated for arbitrary natural number 1 N m ≥ ...

A low power and low-phase noise quadrature voltage controlled oscillator (QVCO) using the differential complementary Colpitts oscillator topology has been developed. A transformer inductor is used to form a differential output oscillator and the back-gate coupling technique is used to generate quadrature outputs. The advantage of proposed QVCO is analyzed in terms of power consumption, phase no...

A new quadrature oscillator circuit using a single differential voltage current conveyor transconductance amplifier (DVCCTA) and four all grounded passive elements is presented. The proposed circuit provides two current quadrature outputs at high impedance and three voltage quadrature outputs simultaneously. The oscillation condition and oscillation frequency are independently controllable. The...