Free space optical (FSO) communication refers to the information transmission technology based on propagation of signals in space. FSO requires that transmitter and receiver directly see each other. High-altitude platforms (HAPs) have been proposed for carrying transceivers stratosphere. A multihop HAP network with links can relay traffic between ground nodes. In this study, we propose an end-t...

A mesh insertion method is presented to merge a tool mesh into a target mesh. All the entities of the tool mesh are preserved in the output mesh while some of the entities of the target mesh are modified or eliminated in order to obtain a topologically conforming mesh. The algorithm can handle non-manifold surfaces formed of quadrilaterals and/or triangles as well as volumetric meshes based on ...

This paper presents a method for automatically generating a hierarchical B-spline surface from an initial set of control points. Given an existing mesh of control points , a mesh with half the resolution , is constructed by simultaneously approximating the finer mesh while minimizing a smoothness constraint using weighted least squares. Curvature measures of are used to identify features that n...

The multislope concept has been recently introduced in the literature to deal with MUSCL reconstructions on triangular and tetrahedral unstructured meshes in the finite volume cell-centered context. Dedicated scalar slopes are used to compute the interpolations on each face of a given element, in opposition to the monoslope methods in which a unique limited gradient is used. The multislope appr...

rent paraesophageal hernia by means of laparoscopic hiatal reinforcement using a 12 ” 10−cm titanium−covered polypropy− lene mesh. He began to experience non− specific epigastric abdominal discomfort 10 months later. An upper endoscopy re− vealed the presence of mesh at the gas− troesophageal junction (l" Fig. 1), which was then removed endoscopically, using grasping forceps (l" Fig. 2). Since ...

The main aim of this paper is to investigate bending behavior in sandwich plates with functionally graded carbon nanotube reinforced composite (FG-CNTRC) face sheets with considering the effects of carbon nanotube (CNT) aggregation. The sandwich plates are assumed resting on Winkler-Pasternak elastic foundation and a mesh-free method based on first order shear deformation theory (FSDT) is devel...