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CATA
1998
13 years 8 months ago
QVI: Query-based virtual index for distributed information retrieval
The large unstructured text collections demand full-text search capabilities from IR systems. Current systems typically allow users only to connect to a single database (or site) ...
Dong-gyu Kim, Sang-goo Lee
JSAC
2006
100views more  JSAC 2006»
13 years 7 months ago
Analysis and optimization of CDMA systems with chip-level interleavers
Abstract--In this paper, we present an unequal power allocation technique to increase the throughput of code-division multiple-access (CDMA) systems with chip-level interleavers. P...
Lihai Liu, Jun Tong, Li Ping
ICSEA
2007
IEEE
14 years 1 months ago
A Model for the Effect of Caching on Algorithmic Efficiency in Radix based Sorting
— This paper demonstrates that the algorithmic performance of end user programs may be greatly affected by the two or three level caching scheme of the processor, and we introduc...
Arne Maus, Stein Gjessing
AAAI
2006
13 years 8 months ago
Compilation of Query-Rewriting Problems into Tractable Fragments of Propositional Logic
We consider the problem of rewriting a query efficiently using materialized views. In the context of information integration, this problem has received significant attention in th...
Yolifé Arvelo, Blai Bonet, Maria-Esther Vid...
ICDE
2002
IEEE
128views Database» more  ICDE 2002»
14 years 8 months ago
Efficiently Ordering Query Plans for Data Integration
The goal of a data integration system is to provide a uniform interface to a multitude of data sources. Given a user query formulated in this interface, the system translates it i...
AnHai Doan, Alon Y. Halevy