نتایج جستجو برای: free form
تعداد نتایج: 1163128 فیلتر نتایج به سال:
biodegradable polymeric nanoparticles (nps) have been intensively studied as a possible way to enhance anti-tumor efficacy while reducing side effects. icd-85, derived from the venom of two separate species of venomous animals, has been shown to exhibit anti-cancer activity. in this report polymer based sodium alginate nanoparticles of icd-85 was used to enhance its therapeutic effects and redu...
FFD represent a widely used model for the non-rigid registration of medical images. The balance between robustness to noise and accuracy in modelling localised motion is typically controlled by the control point grid spacing and the amount of regularisation. More recently, TFFD have been proposed which extend the FFD approach in order to recover smooth motion from temporal image sequences. In t...
This paper introduces new techniques for modeling low degree, smooth freeform surfaces of unrestricted patch layout. In particular, surfaces that are after reparametrization can be built from tensor-product Bézier or spline patches of degree ( ) and (3,d+2); at extraordinary points, these surfaces have the flexibility of splines of total degree . The particular choice, , yields more than vector...
In this paper the notion of free form feature for aesthetic design is presented. The design of industrial products constituted by free form surfaces is done by using CAD systems representing curves and surfaces by means of NURBS functions, which are usually defined by low level entities that are not intuitive and require some knowledge of the mathematical language. Similarly to the feature-base...
This paper investigates a new approach to the recognition of 3D objects of arbitrary shape. The proposed solution follows the principle of model-based recognition using geometric 3D models and geometric matching. It is an alternative to the classical segmentation and primitive extraction approach and provides a perspective to escape its difficulties to deal with free-form shapes. Using the iter...
The problem of designing optical systems that contain free-form surfaces is a challenging one, even in the case of designing a single surface. Here we present a method for the coupled design of two free-form reflective surfaces that will have a prescribed distortion. On one hand, the method can be described using traditional vectors and matrices, which we do, but it is motivated by viewing the ...
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