in this paper, we study projected non-stationary simultaneous it-erative reconstruction techniques (p-sirt). based on algorithmic op-erators, convergence result are adjusted with opial’s theorem. the advantages of p-sirt are demonstrated on examples taken from to-mographic imaging.

We investigate and compare a few parallel preconditioning techniques in the iterative solution of large sparse linear systems arising from solid Earth simulation with and without using contact information in the domain partitioning process. Previous studies are focused on using static or matrix pattern based incomplete LU (ILU) preconditioners in a localized preconditioner implementation. Our c...

It is often necessary to be able to create computer models from physical objects. This is often done for the purposes of reverse engineering, or archival. Many of the contact methods, such as callipers or Coordinate Measuring Machines, are unsuitable for use in areas where the material is delicate. There are numerous techniques that are capable of performing quick accurate measurements of surfa...

An identification problem for parametric variational inequalities and linear complementarity problems is solved here by means of iterative filter techniques. A concrete application in engineering mechanics, the unilateral crack identification problem, is solved. The elastic contact problem is formulated by boundary element-linear complementarity techniques. By means of numerical results and com...

Abstract In this paper, we combine two main topics in mechanics and optimal control theory: contact Hamiltonian systems Pontryagin maximum principle. As an important result, among others, develop a principle that permits to deal with problems dissipation. We also consider the Herglotz problem, which is simultaneously generalization of variational problem. An application study thermodynamic syst...