Sciweavers

9504 search results - page 10 / 1901
» Dynamic Substitution Model
Sort
View
EMNLP
2010
13 years 5 months ago
Unsupervised Induction of Tree Substitution Grammars for Dependency Parsing
Inducing a grammar directly from text is one of the oldest and most challenging tasks in Computational Linguistics. Significant progress has been made for inducing dependency gram...
Phil Blunsom, Trevor Cohn
ACL
2010
13 years 5 months ago
Blocked Inference in Bayesian Tree Substitution Grammars
Learning a tree substitution grammar is very challenging due to derivational ambiguity. Our recent approach used a Bayesian non-parametric model to induce good derivations from tr...
Trevor Cohn, Phil Blunsom
WABI
2005
Springer
110views Bioinformatics» more  WABI 2005»
14 years 1 months ago
Alignment of Tandem Repeats with Excision, Duplication, Substitution and Indels (EDSI)
Abstract. Traditional sequence comparison by alignment applies a mutation model comprising two events, substitutions and indels (insertions or deletions) of single positions (SI). ...
Michael Sammeth, Thomas Weniger, Dag Harmsen, Jens...
BMCBI
2006
120views more  BMCBI 2006»
13 years 7 months ago
Optimizing amino acid substitution matrices with a local alignment kernel
Background: Detecting remote homologies by direct comparison of protein sequences remains a challenging task. We had previously developed a similarity score between sequences, cal...
Hiroto Saigo, Jean-Philippe Vert, Tatsuya Akutsu
BMCBI
2005
73views more  BMCBI 2005»
13 years 7 months ago
Empirical codon substitution matrix
Background: Codon substitution probabilities are used in many types of molecular evolution studies such as determining Ka/Ks ratios, creating ancestral DNA sequences or aligning c...
Adrian Schneider, Gina Cannarozzi, Gaston H. Gonne...