Sciweavers

184 search results - page 22 / 37
» Query Complexity Lower Bounds for Reconstruction of Codes
Sort
View
DC
2008
14 years 11 months ago
Approximate distributed top- k queries
We consider a distributed system where each node keeps a local count for items (similar to elections where nodes are ballot boxes and items are candidates). A top-k query in such ...
Boaz Patt-Shamir, Allon Shafrir
ALMOB
2008
92views more  ALMOB 2008»
14 years 11 months ago
Reconstructing phylogenies from noisy quartets in polynomial time with a high success probability
Background: In recent years, quartet-based phylogeny reconstruction methods have received considerable attentions in the computational biology community. Traditionally, the accura...
Gang Wu, Ming-Yang Kao, Guohui Lin, Jia-Huai You
GLOBECOM
2010
IEEE
14 years 9 months ago
An Exit-Chart Aided Design Procedure for Near-Capacity N-Component Parallel Concatenated Codes
1 Shannon's channel capacity specifies the upper bound on the amount of bits per channel use. In this paper, we explicitly demonstrate that twin-component turbo codes suffer f...
Hong Chen, Robert G. Maunder, Lajos Hanzo
CORR
2010
Springer
99views Education» more  CORR 2010»
14 years 11 months ago
On Equivalence Between Network Topologies
One major open problem in network coding is to characterize the capacity region of a general multi-source multi-demand network. There are some existing computational tools for boun...
Michelle Effros, Tracey Ho, Shirin Jalali
FOCS
2003
IEEE
15 years 4 months ago
Quantum Search of Spatial Regions
: Can Grover’s algorithm speed up search of a physical region—for example a 2-D grid of size √ n × √ n? The problem is that √ n time seems to be needed for each query, j...
Scott Aaronson, Andris Ambainis