shrink fit process is a useful technique in order to introduce beneficial residual stress in compound pressure vessels. in this paper, the effects of geometrical tolerances on residual stresses have been studied for a compound shrink fitted pressure vessel, practically. three layers, which are designed based on an optimum nominal thickness and overlap dimensions and tolerances, have been fitted...

Feature extraction is one of the significant parts of image processing. In the literature, several research efforts have been proposed different feature extraction methods using edge detection, corner detection, etc. One of the key limitations of the existing approaches is the absence of an appropriate feature extraction method. In this paper, we therefore introduce a method of hand feature ext...

At the present study, different properties of Sarin with the formula [(CH3)2CHO]CH3POF was studiedin gas phase. Geometrical optimizations of Sarin, single point calculation, NMR and Electricalparameters were carried out in gas phase with the Hartee -Fock method coupled to 6-31g* basis setsfor all atoms. The results obtained from a comparison between tables and charts came up fordiscussion and a...

In this paper, a ray-tracing technique to predict the propagation channel parameters in indoor scenarios is presented. It is a deterministic technique, fully three-dimensional, based on geometrical optics (GO) and the uniform theory of diffraction (UTD). A model of plane facets is used for the geometrical description of the environment. The ray tracing is accelerated considerably by using the A...

We propose a methodology to automatically generate robot actions for tasks that cannot be abstracted into a geometrical basis because ofed into a geometrical basis because of complex interaction between the robot and the world. Our method considers such a task, robotic excavation, by seeking to satisfy constraints posed by the robot and the world to generate “plans” that optimize an arbitrary c...