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CLEF
2010
Springer
15 years 7 months ago
Revamping Question Answering with a Semantic Approach over World Knowledge
Classic textual question answering (QA) approaches that rely on statistical keyword relevance scoring without exploiting semantic content are useful to a certain extent, but are li...
Nuno Cardoso, Iustin Dornescu, Sven Hartrumpf, Joh...
SIGMOD
2005
ACM
215views Database» more  SIGMOD 2005»
16 years 6 months ago
Nested intervals tree encoding in SQL
Nested Intervals generalize Nested Sets. They are immune to hierarchy reorganization problem. They allow answering ancestor path hierarchical queries algorithmically - without acc...
Vadim Tropashko
SODA
2010
ACM
409views Algorithms» more  SODA 2010»
16 years 3 months ago
Data Structures for Range Minimum Queries in Multidimensional Arrays
Given a d-dimensional array A with N entries, the Range Minimum Query (RMQ) asks for the minimum element within a contiguous subarray of A. The 1D RMQ problem has been studied int...
Hao Yuan, Mikhail J. Atallah
DAGSTUHL
2004
15 years 7 months ago
Personalization of Queries based on User Preferences
Query Personalization is the process of dynamically enhancing a query with related user preferences stored in a user profile with the aim of providing personalized answers. The und...
Georgia Koutrika, Yannis E. Ioannidis
PVLDB
2008
101views more  PVLDB 2008»
15 years 5 months ago
Output perturbation with query relaxation
Given a dataset containing sensitive personal information, a statistical database answers aggregate queries in a manner that preserves individual privacy. We consider the problem ...
Xiaokui Xiao, Yufei Tao