In this paper we address the issue of recognizing Farsi handwritten words. Two types of gradient features are extracted from a sliding vertical stripe which sweeps across a word image. These are directional and intensity gradient features. The feature vector extracted from each stripe is then coded using the Self Organizing Map (SOM). In this method each word is modeled using the discrete Hidde...

In this article a preconditioned version of the Delayed Weighted Gradient Method (DWGM) is presented and analyzed. addition to convergence, some nice properties as A- orthogonality current transformed gradient with all previous vectors well finite convergence are demonstrated. Numerical experimentation also offered, exposing benefits preconditioning.

The Discontinuous Petrov-Galerkin (DPG) method for high frequency wave propagation problems is discussed. The DPG method offers uniform pre-asymptotic stability for any wavenumber. This allows for a fully automatic adaptive hp algorithm, that can start from very coarse meshes. Moreover DPG always delivers a Hermitian positive definite system, suggesting the use of the Conjugate Gradient algorit...