a dom tree alignment model for mining parallel data from the web
Báo cáo khoa học: "A DOM Tree Alignment Model for Mining Parallel Data from the Web" doc
Ngày tải lên :
08/03/2014, 02:21
... proposes a new web parallel data mining
scheme. Given a pair of parallel web pages as
seeds, the Document Object Model
1
(DOM) is
used to represent the web pages as a pair of
DOM trees. Then a ... web
pages manually labeled as parallel or non-
parallel. The Iterative Scaling algorithm (Pietra,
Pietra and Lafferty 1995) is used for the training.
7 Experimental Results
The DOM tree alignment ... discovered are regarded as
anchors to new parallel data. This makes the
mining scheme an iterative process.
The new mining scheme has three advantages:
(i) Mining coverage is increased. Parallel...
- 8
- 435
- 0
Báo cáo khoa học: "Mining Parenthetical Translations from the Web by Word Alignment" potx
Ngày tải lên :
17/03/2014, 02:20
... parenthetical translations are extremely
valuable both as a stand-alone on-line dictionary
and as training data for statistical machine transla-
tion systems. They provide fresh data (new words)
and cover ... that Exact Match is a rather stringent crite-
rion. Table 7 shows a random sample of extracted
parenthetical translations that failed the Exact
Match test. Only a small percentage of them are ... on a partially parallel corpus to extract
translation pairs from the web. Treating the transla-
tion extraction problem as a word alignment prob-
lem allowed us to generalize across instances...
- 9
- 612
- 0
Báo cáo khoa học: "A Tree Transducer Model for Synchronous Tree-Adjoining Grammars" pdf
Ngày tải lên :
17/03/2014, 00:20
... we assume
that all adjunctions are mandatory; i.e., if an aux-
iliary tree can be adjoined, then we need to make
an adjunction. Thus, a derivation starting from an
initial tree to a derived tree ... 2010.
c
2010 Association for Computational Linguistics
A Tree Transducer Model for Synchronous Tree- Adjoining Grammars
Andreas Maletti
Universitat Rovira i Virgili
Avinguda de Catalunya 25, 43002 Tarragona, ... auxiliary tree by a
special marker. Traditionally, the root label A of
an auxiliary tree is replaced by A
∅
once adjoined.
Since we assume that there are no auxiliary trees
with such a root label,...
- 10
- 294
- 0
Tài liệu Báo cáo khoa học: "A Syntax-Driven Bracketing Model for Phrase-Based Translation" pptx
Ngày tải lên :
20/02/2014, 07:20
... to the word align-
ments, we define bracketable and unbracketable
instances. For each of these instances, we auto-
matically extract relevant syntactic features from
the source parse tree as bracketing ... consid-
ered as a syntactic constraint. Therefore we
can use thousands of syntactic constraints to
guide phrase translation.
ã The SDB model maintains and protects the
strength of the phrase-based approach ... in a
better way than the CMVC does. It is able to
reward non-syntactic translations by assign-
ing an adequate probability to them if these
translations are appropriate to particular syn-
tactic...
- 9
- 438
- 0
Tài liệu Báo cáo khoa học: "A Unified Syntactic Model for Parsing Fluent and Disfluent Speech∗" ppt
Ngày tải lên :
20/02/2014, 09:20
... modified for use in a special
repair grammar, which not only reduces the amount
of available training data, but violates our intuition
that most reparanda are fluent up until the actual edit
occurs.
The ... is the fact that there
is often a good deal of overlap in words between
the reparandum and the alteration, as speakers may
trace back several words when restarting after an er-
ror. For instance, ... Communication Re-
search Centre, University of Edinburgh.
John Hale, Izhak Shafran, Lisa Yung, Bonnie Dorr, Mary
Harper, Anna Krasnyanskaya, Matthew Lease, Yang
Liu, Brian Roark, Matthew Snover, and...
- 4
- 581
- 0
Tài liệu Báo cáo khoa học: "A Phrase-based Statistical Model for SMS Text Normalization" ppt
Ngày tải lên :
20/02/2014, 12:20
... groups and domains can
be modeled separately without accessing and
adapting the language model of the MT system
for each SMS application. Another advantage is
that the normalization module can ...
normalization as a translation problem
from the SMS language to the English
language
1
and we propose to adapt a
phrase-based statistical MT model for the
task. Evaluation by 5-fold cross validation ... a consensus translation technique to bootstrap
parallel data using off -the- shelf translation sys-
tems for training a hierarchical statistical transla-
tion model for general domain instant...
- 8
- 399
- 0
Tài liệu Báo cáo khoa học: "GPSM: A GENERALIZED PROBABILISTIC SEMANTIC MODEL FOR AMBIGUITY RESOLUTION" pptx
Ngày tải lên :
20/02/2014, 21:20
... environment. The open test per-
formance can be attributed to the small database
size and the estimation error of the parameters
thus introduced. Because the training database is
small with respect ... sentences while using the remaining parts as
the training set. The overall performance is then
estimated as the average performance of the 10
iterations.
The performance is evaluated in terms of ... under a uniform formulation. The se-
mantic score measure shows substantial im-
provement in structural disambiguation over
a syntax-based approach.
1. Introduction
In a large natural language...
- 8
- 412
- 0
Tài liệu Báo cáo khoa học: Trophoblast-like human choriocarcinoma cells serve as a suitable in vitro model for selective cholesteryl ester uptake from high density lipoproteins pdf
Ngày tải lên :
20/02/2014, 23:20
... island and cell columns, is
formed which maintains the ability of proliferation and
invasion. Choriocarcinoma is a malignant neoplasm that
represents the early trophoblast of the attachment phase ... TOPO-TA cloning vector and sequenced.
Northern blot analysis
Total RNA was isolated from choriocarcinoma and human
liver tissues (used as a positive control) by the RNA-easy kit
(Qiagen) exactly as ... of lipoprotein-associated cholesterol across the
placenta from the maternal circulation [4–8].
The fact that the placenta binds and internalizes maternal
lipoproteins both in vivo and in vitro...
- 12
- 470
- 0
Báo cáo khoa học: A mouse model for in vivo tracking of the major dust mite allergen Der p 2 after inhalation docx
Ngày tải lên :
07/03/2014, 21:20
... band) that the clearance and further metabo-
lism of the allergen was altered as a result of the
inflammation in the lungs of sensitized animals.
Up to now there are few data available on the fate
of ... day 30 displayed an airway
inflammation 18 h after treatment, in the same magni-
tude as in animals challenged with a third HDM aero-
sol on day 30 (data not shown). The animals were
killed after ... visual-
ized by autoradiography using a PhosphorImager with the
image quant software (both from Molecular Dynamics,
Sunnyvale, CA, USA). As standards for SDS ⁄ PAGE
autoradiography,
75
Se-labelled...
- 12
- 518
- 0
Báo cáo khoa học: "A Generalized Vector Space Model for Text Retrieval Based on Semantic Relatedness" pot
Ngày tải lên :
08/03/2014, 21:20
... the
M&C data set. It surpasses HR though in the R&G
and the 353-C data set. The latter contains the
word pairs of the M&C data set. To visualize the
performance of our measure in a more comprehen-
sible ... pattern as the human ratings,
as closely as our measure of relatedness does (low
y values for small x values and high y values for
high x). The same pattern applies in the M&C and
353-C data ... stan-
dard (human judgements).
The correlations for the three data sets show that
SR performs better than any other measure of se-
mantic relatedness, besides the case of (HR) in the
M&C data...
- 9
- 394
- 0
Báo cáo khoa học: "A Class-Based Agreement Model for Generating Accurately Inflected Translations" pptx
Ngày tải lên :
16/03/2014, 19:20
... 5. The inputs are a translation
hypothesis
e
I
1
, an index
n
distinguishing the prefix
from the attachment, and a flag indicating if their
concatenation is a goal hypothesis.
The beam search maintains ... from
phrase-structure trees. Williams and Koehn (2011)
annotated German trees, and extracted translation
rules from them. They then specified manual unifi-
cation rules, and applied a penalty according ... of the
source. This large gap between the unigram recall
of the actual translation output (top) and the lexical
coverage of the phrase-based model (bottom) indi-
cates that translation performance...
- 10
- 414
- 0
Báo cáo khoa học: "A Stacked Sub-Word Model for Joint Chinese Word Segmentation and Part-of-Speech Tagging" potx
Ngày tải lên :
17/03/2014, 00:20
... predict the POS
tag with positional information for each character.
Each character can be assigned one of two possi-
ble boundary tags: “B” for a character that begins a
word and “I” for a character ... readers
to read the above paper for details. For parameter
estimation, our work adopt the Passive-Aggressive
(PA) framework (Crammer et al., 2006), a family
of margin based online learning algorithms. ... segmentation
can also be formulated as a sequential classification
problem to predict whether a character is located at
the beginning of, inside or at the end of a word. This
character-by-character...
- 10
- 412
- 0
Báo cáo khoa học: "A Language-Independent Unsupervised Model for Morphological Segmentation" pot
Ngày tải lên :
17/03/2014, 04:20
... making available the code of the RePortS
algorithm, and Stefan Bordag and Delphine Bern-
hard for running their algorithms on the German
data. Many thanks also to Matti Varjokallio for eval-
uating ... presented
here have been shown to improve accuracy (Kurimo
et al., 2006).
Another motivation for evaluating the system on
a task rather than on manually annotated data is
that linguistically motivated morphological ... the most probable affixes from both ends of
the word, all possible segmentations of the word are
generated and ranked using the language model. The
probabilities for the language model are learnt...
- 8
- 288
- 0
Báo cáo khoa học: "A Hierarchical Phrase-Based Model for Statistical Machine Translation" pptx
Ngày tải lên :
17/03/2014, 05:20
... build only par-
tial translations using hierarchical phrases, and then
combine them serially as in a standard phrase-based
model. For a partial example of a synchronous CFG
derivation, see Figure ... Pharaoh, a state-of -the- art
phrase-based system.
1 Introduction
The alignment template translation model (Och and
Ney, 2004) and related phrase-based models ad-
vanced the previous state of the art ... Yonggang Deng, and William Byrne.
2005. A weighted finite state transducer transla-
tion template model for statistical machine translation.
Natural Language Engineering. To appear.
Daniel Marcu and...
- 8
- 331
- 0
Báo cáo khoa học: "A Generative Constituent-Context Model for Improved Grammar Induction" docx
Ngày tải lên :
17/03/2014, 08:20
... performance or data- likelihood.
However, parameter search methods have a poten-
tial advantage. By aggregating over only valid, com-
plete parses of each sentence, they naturally incor-
porate the ... shown, but are modeled.
Parameter search is also local; parameters which
are locally optimal may be globally poor. A con-
crete example is the experiments from (Carroll and
Charniak, 1992). They restricted ... Communi-
cation Papers for the 97th Meeting of the Acoustical Society
of America, pages 547–550.
Eric Brill. 1993. Automatic grammar induction and parsing free
text: A transformation-based approach....
- 8
- 316
- 0
