To improve the estimation accuracy, a novel time delay (TDE) method based on closed-form offset compensation is proposed. Firstly, we use generalized cross-correlation with phase transform (GCC-PHAT) to obtain initial TDE. Secondly, signal model using normalized cross spectrum established, and noise subspace extracted by eigenvalue decomposition (EVD) of covariance matrix. Using orthogonal rela...

Recovering the relative geometry of two perspective stereo images is a classical problem in photogrammetry and also a basic problem in computer vision. General relative orientation refers to recovering ve relative orientation parameters and two principal distances from pure image measurements. This paper exposes the kernel of a new direct closed-form solution to this problem while the general f...

a method for solving a class of weakly singular volterra integral equations is given by using the fractional differential transform method. the approximate solution of these equa­tions is calculated in the form of a finite series with easily computable terms. while in some examples this series solution increased up to the exact closed solution, in some other examples, we can see the accuracy an...

In the present study, a spectral finite element method is developed for free and forced transverse vibration of Levy-type moderately thick rectangular orthotropic plates based on first-order shear deformation theory. Levy solution assumption was used to convert the two-dimensional problem into a one-dimensional problem. In the first step, the governing out-of-plane differential equations are tr...