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SPIRE
2001
Springer
14 years 1 months ago
Compaction Techniques for Nextword Indexes
Most queries to text search engines are ranked or Boolean. Phrase querying is a powerful technique for refining searches, but is expensive to implement on conventional indexes. I...
Dirk Bahle, Hugh E. Williams, Justin Zobel
GECCO
2010
Springer
176views Optimization» more  GECCO 2010»
13 years 11 months ago
A hierarchical cooperative evolutionary algorithm
To successfully search multiple coadaptive subcomponents in a solution, we developed a novel cooperative evolutionary algorithm based on a new computational multilevel selection f...
Shelly Xiaonan Wu, Wolfgang Banzhaf
CIKM
2004
Springer
14 years 2 months ago
Using a compact tree to index and query XML data
Indexing XML is crucial for efficient XML query processing. We propose a compact tree (Ctree) for XML indexing, which provides not only concise path summaries at group level but a...
Qinghua Zou, Shaorong Liu, Wesley W. Chu
ICPR
2008
IEEE
14 years 3 months ago
A study of on-line handwritten chemical expressions recognition
In this paper, we study the major modules of on-line handwritten chemical expressions recognition. We propose a novel two-level algorithm to recognize expressions. In the first le...
Jufeng Yang, Guangshun Shi, Kai Wang, Qian Geng, Q...
FSE
2003
Springer
99views Cryptology» more  FSE 2003»
14 years 2 months ago
Analysis of Involutional Ciphers: Khazad and Anubis
In this paper we study structural properties of SPN ciphers in which both the S-boxes and the affine layers are involutions. We apply our observations to the recently designed Rijn...
Alex Biryukov