Báo cáo khoa học: "Sparsity in Dependency Grammar Induction" doc

... USA taskar@cis.upenn.edu Abstract A strong inductive bias is essential in un- supervised grammar induction. We ex- plore a particular sparsity bias in de- pendency grammars that encourages a small number of unique dependency types. ... This kind of sparsity bias avoids inducing competition between depen- dent types for each head type. We can achieve the desired bias with a constraint...

Ngày tải lên: 07/03/2014, 22:20

... Groningen Groningen, the Netherlands bart.cramer@gmail.com Abstract I review a number of grammar induction algorithms (ABL, Emile, Adios), and test them on the Eindhoven corpus, resulting in disappointing ... part-of-speech tags as their input (i.e. the words are already labelled), and only induce rules using the given tags. This kind of work is done by, for instance, Klein and Manning (2...

Ngày tải lên: 20/02/2014, 12:20

... pre- serving the annotations. The original annotations can be produced either manually or automatically. Wan (2009) constructs a multilingual classifier using co-training. In co-training, one ... the induction of bilingual lexicons involve gathering new information from a small set of known identities between the lan- guages which is called a seed lexicon and incor- porating intralingual ......

Ngày tải lên: 20/02/2014, 04:20

... case but still linear in the best case. In Section 4, we present experi- ments indicating that the expected running time of the new system on naturally occurring data is in fact linear and that ... approach we will take in the experimental evaluation in Section 4. 3 Transitions for Dependency Parsing Having defined the set of configurations, including initial and terminal configurati...

Ngày tải lên: 20/02/2014, 07:20

... major interaction site for the adenine moiety. In b1, an arginine residue (Ile417 in rPDE2) binds to N1 and a threonine (Ser419 in rPDE2) inter- acts with N7 and the N 6 amino group. The inter- actions ... cGMP binding [13], and, in PDE6, both of the amino acids corresponding to Phe433 ⁄ Asp434 in rPDE2A are required for cGMP binding [14]. Our initial mutations in cyaB1 GAF B also...

Ngày tải lên: 19/02/2014, 02:20

... sterically interfere with side-chain packing in the protein’s interior. Mutations that create cavities in hydro- phobic environments generally cause proteins to become less stable [44,45]. Using the ... general unfolding, not leaving any hydrophobic cleft for bis-ANS binding. High pressure is well known to denature proteins to partially folded states [15,17,38,48–50]. The large increase...

Ngày tải lên: 19/02/2014, 12:20

... a deepening of the lines be- tween the eyebrows, indicating concentration, deter- mination, opposition or hostility.” Definitions of this kind are again not easily handled in machine opera- ... adequate for our purposes. In giving a synonym definition, we are making use of a more general idea, namely, that of defining the intra- linguistic meaning of a word in terms of its relation...

Ngày tải lên: 19/02/2014, 19:20

... C-ter- minus is required for higher order chromatin forma- tion and may offer a stronger docking domain for the H4 tail of a neighbouring nucleosome [71], thereby promoting interparticle folding in ... neighbouring DNA while the C-termini provide docking domains for internucleosomal interactions. Covalent modifications of charged residues in the N-termini and a perturba- tion of the C-term...

Ngày tải lên: 20/02/2014, 02:22

... 300 {u901571,chen.meihua,koromiko1104,Jason.jschang}@gmail.com {u901571,chen.meihua,koromiko1104,Jason.jschang}@gmail.com Abstract We introduce a new method for learning to detect grammatical errors in learner’s writ- ing and provide suggestions. The method involves parsing a reference corpus and inferring grammar ... writing errors might be (a) Use “played” instead of “play.” (b) Use...

Ngày tải lên: 20/02/2014, 05:20

... considering the computational constraints im- posed by integrating the dependency parser into an MT decoder. The table also shows a gain of more than 1% in dependency accuracy by adding ATB, ... changes during de- coding (and thus lessening the need for syntactic decoding) by rearranging input words in the train- ing data to match the syntactic structure of the target language. Finall...

Ngày tải lên: 20/02/2014, 07:20