递归平铺和空间填充曲线,几乎没有碎片
Recursive tilings and space-filling curves with little fragmentation
摘要:
本文定义了一个递归平铺(或空间填充曲线)的Arrwwid数为使得任意球Q可以被总体积为O(vol(Q))的w个平铺(或曲线段)覆盖的最小数w。当处理d维空间中的点集时,可以应用具有低Arrwwid数的递归平铺和空间填充曲线来优化磁盘、内存或服务器访问模式。本文提出了具有最优Arrwwid数的递归平铺和空间填充曲线。对于d >= 3,我们看到规则的立方体镶嵌和空间填充曲线不可能有最优的Arrwwid数,我们看到如何构造具有更好的Arrwwid数的替代方案。
英文摘要:
This paper defines the Arrwwid number of a recursive tiling (or space-filling curve) as the smallest number w such that any ball Q can be covered by w tiles (or curve sections) with total volume O(vol(Q)). Recursive tilings and space-filling curves with low Arrwwid numbers can be applied to optimise disk, memory or server access patterns when processing sets of points in d-dimensional space. This paper presents recursive tilings and space-filling curves with optimal Arrwwid numbers. For d >= 3, we see that regular cube tilings and space-filling curves cannot have optimal Arrwwid number, and we see how to construct alternatives with better Arrwwid numbers.
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