The morphological characteristics of seeds are not affected by environmental factors and can be used to identify the Euphorbia taxa. present study aims determine in 27 taxa using scanning electron microscopy (SEM) light microscope (LM). Findings revealed that show variation size, color, seed surface ornamentations among different species. vary also shape from ovoid, ellipsoidal, globose, quadra...

The aim of Reverse Engineering is to convert an unstructured representation of a geometric object, emerging e.g. from laser scanners, into a natural, structured representation in the spirit of CAD models, which is suitable for numerical computations. Therefore we present a user-controlled, as isometric as possible parameterization technique which is able to prescribe geometric features of the i...


 In this paper, the generation way of three-direction grid prestressed reticulated mega- structure is studied, and mega-structure composite joint specific formation ideas are proposed. The important control parameters determined, geometric modelling method hexagon across middle octagon side Coordinate formula hexagonal octagonal joints derived to ensure reasonable arrangement uniform stre...

We present a piecewise bi-cubic parametric G1 spline surface interpolating the vertices of a quadrangular surface mesh of arbitrary topological type. While tensor product surfaces need a chess boarder parameterization they are not well suited to model surfaces of arbitrary topology without introducing singularities. Our spline surface consists of tensor product patches, but they can be assemble...