flow network models for word alignment
Báo cáo khoa học: "Flow Network Models for Word Alignment and Terminology Extraction from Bilingual Corpora" docx
Ngày tải lên :
17/03/2014, 07:20
... French ones, to a sink, to control the
flow quantity we want to go through the words.
2.1 Flow networks
We meet here the notion of flow networks that
we can formalise in the following way (we ...
reader to (Ford and Fulkerson, 1962; Klein,
1967).
2.2 Alignment models
Flows and networks define a general framework
in which it is possible to model alignments be-
tween words, and to ... translations for
the English term.
4 Conclusion
We presented a new model for word alignment
based on flow networks. This model allows
us to integrate different types of constraints in
the search for...
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Báo cáo khoa học: "Bilingual Topic AdMixture Models for Word Alignment" ppt
Ngày tải lên :
17/03/2014, 04:20
... Retrieving Word Alignments
Two word- alignment retrieval schemes are de-
signed for BiTAMs: the uni-direction alignment
(UDA) and the bi-direction alignment (BDA). Both
use the posterior mean of the alignment ... Null word
and Laplace smoothing for the BiTAM models.
We train, for comparison, IBM-1&4 and HMM
models with 8 iterations of IBM-1, 7 for HMM
and 3 for IBM-4 (1
8
h
7
4
3
) with Null word ... Incorporation of Word “Null”
Similar to IBM models, “Null” word is used for
the source words which have no translation coun-
terparts in the target language. For example, Chi-
nese words “de” ()...
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Báo cáo khoa học: "Data Cleaning for Word Alignment" pdf
Ngày tải lên :
08/03/2014, 01:20
... are
less than 20 percent.
2 1 : n Word Alignment
Our discussion of uni-directional alignments of
word alignment is limited to IBM Model 4.
Definition 1 (Word alignment task) Let e
i
be
the i-th ... two word alignments
as an alignment point, 2) add new alignment points
that exist in the union with the constraint that a
new alignment point connects at least one previ-
ously unaligned word, ... purpose of
the word alignment task is to obtain a lexical
translation probability p(
¯
f
i
|¯e
i
), which is a 1 : n
uni-directional word alignment. The initial idea
underlying the IBM Models, consisting...
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Báo cáo khoa học: "Soft Syntactic Constraints for Word Alignment through Discriminative Training" pot
Ngày tải lên :
08/03/2014, 02:21
... bilin-
gual word alignment finds word- to -word connec-
tions across languages. Originally introduced as a
byproduct of training statistical translation models
in (Brown et al., 1993), word alignment ... Log-linear models for word
alignment. In Meeting of the Association for Computa-
tional Linguistics, pages 459–466, Ann Arbor, USA.
I. D. Melamed. 2000. Models of translational equivalence
among words. ... new information resulting in im-
proved alignments.
2 Constrained Alignment
Let an alignment be the complete structure that
connects two parallel sentences, and a link be
one of the word- to-word...
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Báo cáo khoa học: "Learning Expressive Models for Word Sense Disambiguation" pot
Ngày tải lên :
08/03/2014, 02:21
... words to
the right and left of the verb, identified using POS
tags, represented by has_narrow(snt,
word_ position, word) :
has_narrow(snt
1
, 1st _word_ left, mind).
has_narrow(snt
1
, 1st _word_ right, ... the positions of the words,
represented by has_narrow_trns(snt,
word_ position, portuguese _word) :
has_narrow_trns(snt
1
, 1st _word_ right, como).
has_narrow_trns(snt
1
, 2nd _word_ right, um). … ... for the disambigua-
tion of verbs.
We plan to further evaluate our approach for
other sets of words, including other parts-of-speech
to allow further comparisons with other approach-
es. For...
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Báo cáo khoa học: "Using Similarity Scoring To Improve the Bilingual Dictionary for Word Alignment" doc
Ngày tải lên :
08/03/2014, 07:20
... Automatically-extracted thesauri for
cross-language IR: When better is worse. In Proceed-
ings of COMPUTERM’98.
Eric Gaussier. 1998. Flow network models for word
alignment and terminology extraction ... language word.
is expressed as follows: a word qualifies for clus-
tering if
As before, are all the target language words
that cooccur with source language word .
Similarly to the most frequent words, ... clustering. Those words
that are considered for clustering should account
for more than of the cooccur-
rences of the source language word with any tar-
get language word. If a word falls below...
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Báo cáo khoa học: "Combining Clues for Word Alignment" pdf
Ngày tải lên :
08/03/2014, 21:20
... short words.
340
Combining Clues for Word Alignment
Rirg Tiedemann
Department of Linguistics
Uppsala University
Box 527
SE-751 20 Uppsala, Sweden
joerg@stp.ling.uu.se
Abstract
In this paper, a word ... bilingual
lexical information. Word alignment approaches
focus on the automatic identification of translation
relations in translated texts. Alignments are usu-
ally represented as a set of links between words
and ... an alignment clue for the cor-
responding word pairs. The likelihood of each
translation alternative can be weighted, e.g., by
frequency (if available).
2.3 Clue Combinations
So far, word alignment...
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Báo cáo khoa học: "Confidence Measure for Word Alignment" potx
Ngày tải lên :
17/03/2014, 01:20
... based on word alignment.
In this paper we introduce a confidence mea-
sure for word alignment, which is robust to extra
or missing words in the bilingual sentence pairs,
as well as word alignment ... confidence sentence
alignments and alignment links from mul-
tiple word alignments of the same sen-
tence pair. Additionally, we remove
low confidence alignment links from the
word alignment of a bilingual ... the same word does in-
crease the confusion for word alignment and re-
duce the link confidence. On the other hand, ad-
ditional information (such as the distance of the
word pair, the alignment...
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Tài liệu Báo cáo khoa học: "Word Alignment for Languages with Scarce Resources Using Bilingual Corpora of Other Language Pairs" pptx
Ngày tải lên :
20/02/2014, 12:20
... two parameters for the dis-
tortion probability: one for head words and the
other for non-head words.
Distortion Probability for Head Words
The distortion probability for head
words represents ... two word alignment models for language
pairs L1-L3 and L2-L3, respectively. And then,
with L3 as a pivot language, we can build a word
alignment model for L1 and L2 based on the
above two models. ... language word similarity of the Chinese word c and the Japanese
word given the English word
);,( efcsim
f
e
Figure 1. Similarity Calculation
English word e. For the ambiguous English word
e,...
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Tài liệu Báo cáo khoa học: "Guiding Statistical Word Alignment Models With Prior Knowledge" pdf
Ngày tải lên :
20/02/2014, 12:20
... as 1.
In building word alignment models, a special
“NULL” word is usually introduced to address tar-
get words that align to no source words. Since this
physically non-existing word is not in the ... computational
4
2 Constrained Word Alignment Models
The framework that we propose to incorporate sta-
tistical constraints into word alignment models is
generic. It can be applied to complicated models
such IBM ... candidate. This information is de-
rived before word alignment model training and will
act as soft constraints that need to be respected dur-
ing training and alignments. For a given word pair,
the...
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Báo cáo khoa học: "The S-Space Package: An Open Source Package for Word Space Models" pdf
Ngày tải lên :
17/03/2014, 00:20
... with
all word space models, which facilitates word
space based applications.
The package is written in Java and defines a
standardized Java interface for word space algo-
rithms. While other word ... July 2010.
c
2010 Association for Computational Linguistics
The S-Space Package: An Open Source Package for Word Space Models
David Jurgens
University of California, Los Angeles,
4732 Boelter ... algorithms,
code documentation and mailing list archives.
2 Word Space Models
Word space models are based on the contextual
distribution in which a word occurs. This ap-
proach has a long history in linguistics,...
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Báo cáo khoa học: "Better Word Alignments with Supervised ITG Models" pdf
Ngày tải lên :
17/03/2014, 01:20
... rea-
sonable alignments, word alignment models must
constrain the set of alignments considered. In this
section, we discuss and compare alignment fami-
lies used to train our discriminative models.
Initially, ... many-to-one block alignment
potential, and efficient pruning, ITG models can
yield state-of-the art word alignments, even when
the underlying gold alignments are highly non-
ITG. Our models yielded ... across alignments. Specif-
ically, for each alignment cell (i, j) which is not
a possible alignment in a
∗
, we incur a loss of 1
when a
ij
= a
∗
ij
; note that if (i, j) is a possible
alignment, ...
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Báo cáo khoa học: "Optimizing Word Alignment Combination For Phrase Table Training" pptx
Ngày tải lên :
17/03/2014, 02:20
... syntax-based translation framework.
Most word alignment models distinguish trans-
lation direction in deriving word alignment matrix.
Given a parallel sentence, word alignments in two
directions are ... different word align-
ment combination methods
4 Conclusions
We presented a simple yet effective method for
word alignment symmetrization and combination
in general. The problem is formulated ... DARPA
TransTac program for funding and the anonymous
reviewers for their constructive suggestions.
References
N. F. Ayan. 2005. Combining Linguistic and Machine Learn-
ing Techniques for Word Alignment Improvement....
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Báo cáo khoa học: "Discriminative Pruning of Language Models for Chinese Word Segmentation" ppt
Ngày tải lên :
17/03/2014, 04:20
...
model for Chinese word segmentation was pro-
posed. Gao et al. (2005) further developed it to a
linear mixture model. In these statistical models,
language models are essential for word segmen-
tation ... bigram
probability P
m
(w
y
|w
x
) for seen bigram w
x
w
y
in
training corpus, unigram probability P
m
(w) and
backoff coefficient α
m
(w) for any word w. For
any w
x
and w
y
in the vocabulary, ... pages 1001–1008,
Sydney, July 2006.
c
2006 Association for Computational Linguistics
Discriminative Pruning of Language Models for
Chinese Word Segmentation
Jianfeng Li Haifeng Wang Dengjun...
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- converged network security for dummies
- atomic models for diffusion
- basic models for repairable systems
- tip and tricks for word 2000
- new models for improving
- statistical decisiontree models for parsing
- a method for word sense
- improving bitext word alignments
- improving domainspecific word alignment
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