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» Improved Algorithms for Uniform Partitions of Points
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COMPGEOM
2009
ACM
15 years 4 months ago
k-means requires exponentially many iterations even in the plane
The k-means algorithm is a well-known method for partitioning n points that lie in the d-dimensional space into k clusters. Its main features are simplicity and speed in practice....
Andrea Vattani
COMPGEOM
2009
ACM
15 years 6 months ago
Shooting permanent rays among disjoint polygons in the plane
We present a data structure for ray shooting-and-insertion in the free space among disjoint polygonal obstacles with a total of n vertices in the plane, where each ray starts at t...
Mashhood Ishaque, Bettina Speckmann, Csaba D. T&oa...
DAC
2005
ACM
16 years 20 days ago
MiniBit: bit-width optimization via affine arithmetic
MiniBit, our automated approach for optimizing bit-widths of fixed-point designs is based on static analysis via affine arithmetic. We describe methods to minimize both the intege...
Dong-U Lee, Altaf Abdul Gaffar, Oskar Mencer, Wayn...
INFOCOM
2007
IEEE
15 years 6 months ago
On Node Isolation Under Churn in Unstructured P2P Networks with Heavy-Tailed Lifetimes
— Previous analytical studies [12], [18] of unstructured P2P resilience have assumed exponential user lifetimes and only considered age-independent neighbor replacement. In this ...
Zhongmei Yao, Xiaoming Wang, Derek Leonard, Dmitri...
SIAMCOMP
2008
137views more  SIAMCOMP 2008»
14 years 11 months ago
Approximate Shortest Paths in Anisotropic Regions
Our goal is to find an approximate shortest path for a point robot moving in a planar subdivision with n vertices. Let 1 be a real number. Distances in each face of this subdivis...
Siu-Wing Cheng, Hyeon-Suk Na, Antoine Vigneron, Ya...