منابع مشابه
CSP patches
Laplacian filters are widely used in neuroscience. In the context of brain–computer interfacing, they might be preferred to data-driven approaches such as common spatial patterns (CSP) in a variety of scenarios such as, e.g., when no or few user data are available or a calibration session with a multi-channel recording is not possible, which is the case in various applications. In this paper we...
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CAD systems are usually based on a tensor product representation of free form surfaces. In this case, trimmed patches are used for modeling non rectangular zones. Trimmed patches provide a reasonable solution for the representation of general topologies, provided that the gap between equivalent trimming curves in the euclidean space is small enough. Several commercial CAD systems, however, repr...
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A hexagonal patch is a plane graph in which inner faces have length 6, inner vertices have degree 3, and boundary vertices have degree 2 or 3. We consider the following counting problem: given a sequence of twos and threes, how many hexagonal patches exist with this degree sequence along the outer face? This problem is motivated by the study of benzenoid hydrocarbons and fullerenes in computati...
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We define a toric surface patch associated with a convex polygon, which has vertices with integer coordinates. This rational surface patch naturally generalizes classical Bézier surfaces. Several features of toric patches are considered: affine invariance, convex hull property, boundary curves, implicit degree and singular points. The method of subdivision into tensor product surfaces is introd...
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Given the present obsession with pattern formation, it is hard to appreciate that 30 years ago there were but few eccentrics who knew what the words meant. In those days, any who tried to understand patterns searched throughout zoology and botany for colleagues who shared their interest. Topics of research included the spacing of hairs on sheep or of stomata in plants, and the orientation of in...
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ژورنال
عنوان ژورنال: European Journal of Vascular and Endovascular Surgery
سال: 1996
ISSN: 1078-5884
DOI: 10.1016/s1078-5884(96)80066-9