Article history: Received 20 January 2014 Received in revised form 28 August 2014 Accepted 19 November 2014 Available online 26 November 2014

in this paper, a new numerical method for solving time-fractional diffusion equations is introduced. for this purpose, finite difference scheme for discretization in time and chebyshev collocation method is applied. also, to simplify application of the method, the matrix form of the suggested method is obtained. illustrative examples show that the proposed method is very efficient and accurate.

Recently a t ime d i f fe rence measurement system was developed i n the Frequency & Time Standards Section o f the Nat ional Bureau o f Standards and independently a t the Nat ional Research Council which shows more than three orders of magnitude improvement over that which is cur ren t ly ava i lab le comnerc ia l l y . Cur ren t s ta te -o f the-ar t t ime d i f fe rence measurement devices ...

The multiresolution time-domain (MRTD) algorithm is applied to the problem of general two-dimensional electromagnetic scattering. A Haar wavelet expansion is utilized. A parallel between Haar MRTD and the classic Yee finite difference time-domain (FDTD) algorithm is discussed, and results of simulations on canonical targets are shown for comparison. We focus on the incident-field implementation...

In a fluid-saturated porous medium, an electromagnetic (EM) wavefield induces an acoustic wavefield due to the electrokinetic effect. A potential geophysical application of this effect is electroseismic (ES) logging, in which the converted acoustic wavefield is received in a fluid-filled borehole to evaluate the parameters of the porous formation around the borehole. In this paper, a finite-dif...

We study the semantic difference operator defined in [16] for ALN . We give a polynomial-time algorithm to compute it. We compare it with the syntactic difference operator defined in [7], for which we also give a polynomial-time algorithm for ALN .