5,484 research outputs found
An adaptive finite-state automata application to the problem of reducing the number of states in approximate string matching
This paper presents an alternative way to use finite-state automata in order to deal with approximate string matching. By exploring some adaptive features that enable any finitestate automaton model to change configuration during computational steps, dynamically deleting or creating new transitions, we can actually control the behavior and the topology of the automaton. We use these features for an application to approximate string matching trying to reduce the number of states requiredEje: VI Workshop de Agentes y Sistemas Inteligentes (WASI)Red de Universidades con Carreras en Informática (RedUNCI
An adaptive finite-state automata application to the problem of reducing the number of states in approximate string matching
This paper presents an alternative way to use finite-state automata in order to deal with approximate string matching. By exploring some adaptive features that enable any finitestate automaton model to change configuration during computational steps, dynamically deleting or creating new transitions, we can actually control the behavior and the topology of the automaton. We use these features for an application to approximate string matching trying to reduce the number of states requiredEje: VI Workshop de Agentes y Sistemas Inteligentes (WASI)Red de Universidades con Carreras en Informática (RedUNCI
Computation of distances for regular and context-free probabilistic languages
Several mathematical distances between probabilistic languages have been investigated in the literature, motivated by applications in language modeling, computational biology, syntactic pattern matching and machine learning. In most cases, only pairs of probabilistic regular languages were considered. In this paper we extend the previous results to pairs of languages generated by a probabilistic context-free grammar and a probabilistic finite automaton.PostprintPeer reviewe
Fast and Compact Regular Expression Matching
We study 4 problems in string matching, namely, regular expression matching,
approximate regular expression matching, string edit distance, and subsequence
indexing, on a standard word RAM model of computation that allows
logarithmic-sized words to be manipulated in constant time. We show how to
improve the space and/or remove a dependency on the alphabet size for each
problem using either an improved tabulation technique of an existing algorithm
or by combining known algorithms in a new way
Improved Approximate String Matching and Regular Expression Matching on Ziv-Lempel Compressed Texts
We study the approximate string matching and regular expression matching
problem for the case when the text to be searched is compressed with the
Ziv-Lempel adaptive dictionary compression schemes. We present a time-space
trade-off that leads to algorithms improving the previously known complexities
for both problems. In particular, we significantly improve the space bounds,
which in practical applications are likely to be a bottleneck
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