Sciweavers

SIAMJO
2010
121views more  SIAMJO 2010»
13 years 8 months ago
Optimization Strategies for the Vulnerability Analysis of the Electric Power Grid
Identifying small groups of lines, whose removal would cause a severe blackout, is critical for the secure operation of the electric power grid. We show how power grid vulnerabilit...
Ali Pinar, Juan Meza, Vaibhav Donde, Bernard C. Le...
MOR
2010
113views more  MOR 2010»
13 years 8 months ago
Projecting an Extended Formulation for Mixed-Integer Covers on Bipartite Graphs
We consider the mixed integer version of bipartite vertex cover. This is equivalent to the mixed integer network dual model, recently introduced in [2], that generalizes several m...
Michele Conforti, Laurence A. Wolsey, Giacomo Zamb...
MP
2008
99views more  MP 2008»
13 years 10 months ago
Compact formulations as a union of polyhedra
We explore one method for finding the convex hull of certain mixed integer sets. The approach is to break up the original set into a small number of subsets, find a compact polyhed...
Michele Conforti, Laurence A. Wolsey
IPCO
2007
143views Optimization» more  IPCO 2007»
13 years 11 months ago
On the Exact Separation of Mixed Integer Knapsack Cuts
During the last decades, much research has been conducted deriving classes of valid inequalities for single-row mixed integer programming polyhedrons. However, no such class has ha...
Ricardo Fukasawa, Marcos Goycoolea
GECCO
2006
Springer
143views Optimization» more  GECCO 2006»
14 years 1 months ago
Hybrid search for cardinality constrained portfolio optimization
In this paper, we describe how a genetic algorithm approach added to a simulated annealing (SA) process offers a better alternative to find the mean variance frontier in the portf...
Miguel A. Gomez, Carmen X. Flores, Maria A. Osorio
WECWIS
2003
IEEE
118views ECommerce» more  WECWIS 2003»
14 years 3 months ago
Trade Determination in Multi-Attribute Exchanges
Electronic exchanges are double-sided marketplaces that allow multiple buyers to trade with multiple sellers, with aggregation of demand and supply across the bids to maximize the...
S. Kameshwaran, Y. Narahari