corpusbased induction of syntactic structure models of dependency and constituency
Tài liệu Báo cáo khoa học: "Computationally Efficient M-Estimation of Log-Linear Structure Models∗" doc
Ngày tải lên :
20/02/2014, 12:20
... Joint and conditional estimation of tagging
and parsing models. In Proc. of ACL.
D. Klein and C. D. Manning. 2002. Conditional structure vs.
conditional estimation in NLP models. In Proc. of EMNLP.
J. ... minimization of
(w) as a way of training a log-linear model.
4 Algorithms for Models of Sequences and
Trees
We discuss here some implementation aspects of the
application of M-estimation to NLP models.
4.1 ... Introduction
Log-linear models are a very popular tool in natural
language processing, and are often lauded for per-
mitting the use of “arbitrary” and “correlated” fea-
tures of the data by a model. Users of log-linear
models...
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Tài liệu Báo cáo khoa học: "Parsing with generative models of predicate-argument structure" pptx
Ngày tải lên :
20/02/2014, 16:20
... the probability of
this dependency can only be estimated from occur-
rences of the same construction, since dependency
relations are defined in terms of local trees and not
in terms of the underlying ... between
the dependency relations of Hij and geeft in the
first sentence, bloem and geeft in the second sen-
tence and politieman and geeft in the third sentence.
Even with the indices, either the dependency ... mod-
els on section 23 in terms of the accuracy of lexical
categories, Parseval scores, and in terms of the re-
covery of word-word dependencies in the predicate-
argument structure. Here, results are...
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Báo cáo khoa học: "Unlexicalised Hidden Variable Models of Split Dependency Grammars∗" pdf
Ngày tải lên :
17/03/2014, 02:20
... derivation of a sequence of
left dependents of u, we redefine the right-hand side of L
p
u
\L
1
v
as 1
l
v
, L
1
w
L
q
u
\L
1
w
and include the production 1
l
v
, L
1
w
→
1
l
v
L
1
w
in the set of ... that governs both v and w, and w
precedes v. To encode the linear relationship be-
tween w and v, we redefine the right-hand side of
R
p
u
/R
1
v
as R
q
u
/R
1
w
R
1
w
, 1
r
v
and include the pro-
duction ... massive
lexicalisation of dependency models might not be
necessary to achieve competitive performance. Fu-
ture work will lie in investigating the issue of lex-
icalisation in the context of dependency parsing...
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Báo cáo khoa học: "Scalable Inference and Training of Context-Rich Syntactic Translation Models" pptx
Ngày tải lên :
17/03/2014, 04:20
... com-
plement span of any node n to each of its children,
and for each of them, add the span of the child
to the complement span of all other children. In
another traversal of G, we determine ... ex-
traction and derivation building algorithm.
963
lhs
1
: NP-C(x
0
:NPB PP(IN (of) x
1
:NP-C)) (NP -of- NP)
lhs
2
: PP(IN (of) NP-C(x
0
:NPB PP(IN (of) NP-C(x
1
:NPB x
2
:VP)))) (of- NP -of- NP-VP)
lhs
3
: ... possible ways of attaching to constituents
of π: besides the highest attachment (rule (f)),
can move along the ancestors of France, since it is
to the right of the translation of that word, and be
considered...
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Báo cáo khoa học: "Using Lexical Dependency and Ontological Knowledge to Improve a Detailed Syntactic and Semantic Tagger of English" pot
Ngày tải lên :
17/03/2014, 04:20
... set
of features: the article before; the POS before
and after; the preposition before and after, and the
syntactic category before and after the word be-
ing labeled. The features used in both of ... The set of predicates query member-
ship of all levels of the taxonomy for all WordNet
senses of the word being tagged. An example of
one such predicate is shown in the figure.
Only 63% of running ... strong im-
provements in overall system accuracy:
dependency knowledge improved perfor-
mance over all classes of word, and knowl-
edge of the position of a word in an on-
tological hierarchy increased...
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Báo cáo khoa học: "PCFGs, Topic Models, Adaptor Grammars and Learning Topical Collocations and the Structure of Proper Names" ppt
Ngày tải lên :
23/03/2014, 16:20
... between two
very different kinds of probabilistic models; LDA
models of the kind used for topic modelling, and
PCFGs, which are a standard model of hierarchi-
cal structure in language. The embedding ... LDA
topic models and PCFG-style grammars. We jus-
tified this claim by presenting several hybrid mod-
els that combine aspects of both topic models and
1155
Proceedings of the 48th Annual Meeting of ... 2009).
Here we present an adaptor grammar based on
the insights of the PCFG encoding of LDA topic
models that learns some of the structure of proper
names. The key idea is that elements in proper
names...
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A methodology for validation of integrated systems models with an application to coastal-zone management in south-west sulawesi
Ngày tải lên :
06/11/2012, 10:35
...
soundness and completeness of model structure together with the plausibility and
correctness of the model behaviour”.
The process of establishing the validity of the model structure and model ... years of experience, source of knowledge and level of interest of
expert i on a certain set of questions, respectively. Their values are in the range between
zero and two. The result of Eq. ... (Stephens and Hess, 1999; Turner,
2000; De Kok and Wind, 2002). These studies are often involved with the design and
application of a number of Integrated Systems Models (ISMs). These models are...
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STRUCTURE ANALYSIS OF POLYSACCHARIDE ESTERS
Ngày tải lên :
25/10/2013, 16:20
... spectral
integralsoftheprotonsoftheAGUandthemethylprotonsofthepropionylmoiety
can be applied to calculate both the partial and the overall DS values of the acetate
by means of Eqs. (8.2) and (8.3).
Fig. ... and back-titration of the excess base is one of the oldest and easiest
methods for the determination of the DS. In the case of short-chain aliphatic
esters (C
2
–C
4
) of glucans, galactans and ... the structure determination of cellulose acetate by FAB-MS after per-
methylation, perdeuteromethylation and random cleavage
Within the scope of this chapter, the analysis of the distribution of...
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Models of motherhood in the abortion debate - self-sacrifice versus self-defence
Ngày tải lên :
01/11/2013, 08:20
... the
case of pregnancy, if a woman consents to the eVects of the fetus, we have an
example of the symbiotic ideal of mother and child that cultures so often
idealize. However, given the quality and ... woman and a fetus.
There is much to value, of course, in locating the abortion decision within
the framework of women’s traditional roles, and such a portrayal of the
abortion decision as part and ... with
homicide of the inhabitants of the farm house, he can rightly point out that the object
of the law of homicide is to save life, and that by his conduct he has eVected a net
saving of innocent...
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