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» Indexing Text with Approximate q-Grams
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CPM
2000
Springer
124views Combinatorics» more  CPM 2000»
13 years 9 months ago
Indexing Text with Approximate q-Grams
We present a new index for approximate string matching. The index collects text q-samples, that is, disjoint text substrings of length q, at fixed intervals and stores their posi...
Gonzalo Navarro, Erkki Sutinen, Jani Tanninen, Jor...
CIKM
2010
Springer
13 years 3 months ago
Hypergraph-based multilevel matrix approximation for text information retrieval
In Latent Semantic Indexing (LSI), a collection of documents is often pre-processed to form a sparse term-document matrix, followed by a computation of a low-rank approximation to...
Haw-ren Fang, Yousef Saad
SPIRE
2009
Springer
13 years 11 months ago
Indexing Variable Length Substrings for Exact and Approximate Matching
We introduce two new index structures based on the q-gram index. The new structures index substrings of variable length instead of q-grams of fixed length. For both of the new ind...
Gonzalo Navarro, Leena Salmela
CIKM
1997
Springer
13 years 9 months ago
Block Addressing Indices for Approximate Text Retrieval
Although the issue of approximate text retrieval is gaining importance in the last years, it is currently addressed by only a few indexing schemes. To reduce space requirements, t...
Ricardo A. Baeza-Yates, Gonzalo Navarro
MICS
2010
137views more  MICS 2010»
13 years 3 months ago
Finding Range Minima in the Middle: Approximations and Applications
Abstract. A Range Minimum Query asks for the position of a minimal element between two specified array-indices. We consider a natural extension of this, where our further constrai...
Johannes Fischer, Volker Heun