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ICDE
2010
IEEE
209views Database» more  ICDE 2010»
15 years 4 months ago
Optimal tree node ordering for child/descendant navigations
Abstract— There are many applications in which users interactively access huge tree data by repeating set-based navigations. In this paper, we focus on label-specific/wildcard c...
Atsuyuki Morishima, Keishi Tajima, Masateru Tadais...
CORR
2007
Springer
76views Education» more  CORR 2007»
14 years 10 months ago
Optimizing diversity
We consider the problem of minimizing the size of a set system G such that every subset of {1, . . . , n} can be written as a disjoint union of at most k members of G, where k and...
Yannick Frein, Benjamin Lévêque, Andr...
JCT
2006
46views more  JCT 2006»
14 years 10 months ago
Optimal tristance anticodes in certain graphs
For z1, z2, z3 Zn, the tristance d3(z1, z2, z3) is a generalization of the L1-distance on Zn to a quantity that reflects the relative dispersion of three points rather than two. ...
Tuvi Etzion, Moshe Schwartz, Alexander Vardy
GLOBECOM
2006
IEEE
15 years 4 months ago
Distributed Multi-Cell Zero-Forcing Beamforming in Cellular Downlink Channels
Abstract— For a multiple-input single-output (MISO) downlink channel with ¢ transmit antennas, it has been recently proved that zero-forcing beamforming (ZFBF) to a subset of (a...
Oren Somekh, Osvaldo Simeone, Yeheskel Bar-Ness, A...
GECCO
2005
Springer
110views Optimization» more  GECCO 2005»
15 years 3 months ago
A genetic algorithm encoding for a class of cardinality constraints
A genetic algorithm encoding is proposed which is able to automatically satisfy a class of important cardinality constraints where the set of distinct values of the design variabl...
Helio J. C. Barbosa, Afonso C. C. Lemonge