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ICDE
2012
IEEE
228views Database» more  ICDE 2012»
11 years 10 months ago
A General Method for Estimating Correlated Aggregates over a Data Stream
—On a stream of two dimensional data items (x, y) where x is an item identifier, and y is a numerical attribute, a correlated aggregate query requires us to first apply a selec...
Srikanta Tirthapura, David P. Woodruff
JGO
2010
75views more  JGO 2010»
13 years 6 months ago
Optimal control of a quasi-variational obstacle problem
We consider an optimal control where the state-control relation is given by a quasi-variational inequality, namely a generalized obstacle problem. We give an existence result for s...
Samir Adly, Maïtine Bergounioux, Mohamed Ait ...
PROCEDIA
2010
173views more  PROCEDIA 2010»
13 years 6 months ago
Combination of an adaptive multilevel SQP method and a space-time adaptive PDAE solver for optimal control problems
We present an adaptive multilevel generalized SQP method to solve PDAE-constrained optimization problems. It explicitly allows the use of independent integration schemes such that...
Debora Clever, Jens Lang, Stefan Ulbrich, J. Carst...
ORL
1998
130views more  ORL 1998»
13 years 8 months ago
Accelerating convergence in the Fermat-Weber location problem
This paper presents a simple procedure for accelerating convergence in a generalized Fermat–Weber problem with lp distances. The main idea is to multiply the predetermined step ...
Jack Brimberg, Reuven Chen, Doron Chen
CORR
2010
Springer
58views Education» more  CORR 2010»
13 years 6 months ago
Realizable Paths and the NL vs L Problem
A celebrated theorem of Savitch [Sav70] states that NSPACE(S) ⊆ DSPACE(S2 ). In particular, Savitch gave a deterministic algorithm to solve ST-CONNECTIVITY (an NL-complete probl...
Shiva Kintali