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ICDE
2004
IEEE
90views Database» more  ICDE 2004»
14 years 11 months ago
Multiresolution Indexing of XML for Frequent Queries
XML and other types of semi-structured data are typically represented by a labeled directed graph. To speed up path expression queries over the graph, a variety of structural inde...
Hao He, Jun Yang 0001
XSYM
2004
Springer
129views Database» more  XSYM 2004»
14 years 3 months ago
Fractional XSketch Synopses for XML Databases
A key step in the optimization of declarative queries over XML data is estimating the selectivity of path expressions, i.e., the number of elements reached by a specific navigatio...
Natasha Drukh, Neoklis Polyzotis, Minos N. Garofal...
COR
2008
142views more  COR 2008»
13 years 9 months ago
Modeling and solving the rooted distance-constrained minimum spanning tree problem
In this paper we discuss models and methods for solving the rooted distance constrained minimum spanning tree problem which is defined as follows: given a graph G = (V, E) with no...
Luis Gouveia, Ana Paias, Dushyant Sharma
IPPS
2003
IEEE
14 years 3 months ago
Task Graph Scheduling Using Timed Automata
In this paper we develop a methodology for treating the problem of scheduling partially-ordered tasks on parallel machines. Our framework is based on the timed automaton model, or...
Yasmina Abdeddaïm, Abdelkarim Kerbaa, Oded Ma...
SIGECOM
2003
ACM
124views ECommerce» more  SIGECOM 2003»
14 years 3 months ago
Coalitional games on graphs: core structure, substitutes and frugality
We study mechanisms that can be modelled as coalitional games with transferable utilities, and apply ideas from mechanism design and game theory to problems arising in a network d...
Rahul Garg, Vijay Kumar, Atri Rudra, Akshat Verma