bagging and distributional similarity
Báo cáo khoa học: "Reducing semantic drift with bagging and distributional similarity" pdf
Ngày tải lên :
08/03/2014, 00:20
... ACL and the 4th IJCNLP of the AFNLP, pages 396–404,
Suntec, Singapore, 2-7 August 2009.
c
2009 ACL and AFNLP
Reducing semantic drift with bagging and distributional similarity
Tara McIntosh and ... and WMEB using just the
hand-picked seeds (S
hand
) and 50 sample super-
vised bagging (S
gold
BAG).
Bagging with samples from S
gold
successfully
increased the performance of both BASILISK and
WMEB ... L
hand
to
sample from and then another round with the 50
sets of randomly unsupervised seeds, S
rand
.
The next decision is how to sample S
rand
from
L
hand
. One approach is to use uniform random
sampling...
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Tài liệu Báo cáo khoa học: "Finding Synonyms Using Automatic Word Alignment and Measures of Distributional Similarity" pdf
Ngày tải lên :
20/02/2014, 12:20
... correct alignments and this
causes many mistakes in the distributional simi-
larity algorithm. We have given some examples in
rows 4 and 5 of table 5.
We have used the distributional similarity score
only ... Alignment and Measures of
Distributional Similarity
Lonneke van der Plas & J
¨
org Tiedemann
Alfa-Informatica
University of Groningen
P.O. Box 716
9700 AS Groningen
The Netherlands
{vdplas,tiedeman}@let.rug.nl
Abstract
There ... using
measures of distributional similarity, but
these typically are not able to distin-
guish between synonyms and other types
of semantically related words such as
antonyms, (co)hyponyms and hypernyms.
We...
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Báo cáo khoa học: "Word classification based on combined measures of distributional and semantic similarity" docx
Ngày tải lên :
08/03/2014, 21:20
... combined and the
distributional weighting schemas.
The combined weighting schema thus showed
relative improvement on the distributional one:
1.5% (BNC) and 2.3% (AP) in terms of precision
and 9.2% ... each weighted
by the distributional similarity of the neighbor to
the test word. Figure 3 compares the precision
and learning accuracy of the combined weighting
schema to the distributional weighting. ... semantic similarity to other classes.
Besides distributional data, our method integrates
this semantic information: the classification decision
is a function of both (1) the distributional similarity
of...
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Báo cáo khoa học: "Finding Word Substitutions Using a Distributional Similarity Baseline and Immediate Context Overlap" potx
Ngày tải lên :
08/03/2014, 21:20
... (see Geffet and Dagan, 2004 and Gef-
fet and Dagan, 2005, who improve the output of a
distributional similarity system for an entailment
task using a web-based feature inclusion check,
and comment ... ‘murder’ and ‘abduct’
kill murder abduct
two birds with babies that life her and make
cancer cells and his wife and an innocent man
a mocking bird thousands of innocent unsuspecting people and
or ... Geffet and Ido Dagan. 2004. Feature Vector
Quality and Distributional Similarity. Proceedings
Of the 20th International Conference on Computa-
tional Linguistics, 2004.
Maayan Geffet and Ido...
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Tài liệu Báo cáo khoa học: "Measures of Distributional Similarity" ppt
Ngày tải lên :
20/02/2014, 18:20
...
Speech and Language,
9:123-152.
Ido Dagan, Lillian Lee, and Fernando Pereira.
1999. Similarity- based models of cooccur-
rence probabilities.
Machine Learning,
34(1-
3) :43-69.
Ute Essen and ...
Thomas M. Cover and Joy A. Thomas. 1991.
Elements of Information Theory.
John Wiley.
Ido Dagan, Shanl Marcus, and Shanl Marko-
vitch. 1995. Contextual word similarity
and estimation from ...
nando Pereira, and Stuart Shieber for helpful
discussions, the anonymous reviewers for their
insightful comments, Fernando Pereira for ac-
cess to computational resources at AT&T, and...
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Tài liệu Báo cáo khoa học: "Distributional Similarity Models: Clustering Neighbors" doc
Ngày tải lên :
20/02/2014, 18:20
...
1995. Contextual word similarity and estimation
from sparse data.
Computer Speech and Lan-
guage,
9:123-152.
Ido Dagan, Lillian Lee, and Fernando Pereira. 1999.
Similarity- based models ...
parison of distributional clustering and nearest-
neighbors averaging on several large datasets,
exploring the tradeoff in similarity- based mod-
eling between memory usage on the one hand
and estimation ... Douglas Baker and Andrew Kachites McCallum.
1998. Distributional clustering of words for text
classification. In
Plst Annual International A CM
SIGIR Conference on Research and Development...
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Báo cáo khoa học: "Syntactic Features and Word Similarity for Supervised Metonymy Resolution" pot
Ngày tải lên :
08/03/2014, 04:22
... Scotland
subj-of subj-of
win lose
context reduction
Pakistan
Scotland-subj-of-losePakistan-subj-of-win
similarity
semantic class
head similarity
role similarity
Pakistan
had ... in the semi-finalScotland
Figure 1: Context reduction and similarity levels
draw this inference, two levels of similarity need to
be taken into account. One concerns the similarity of
the words ... both the similarity of the heads in the gram-
matical relation (e.g., “win” and “lose”) and that of
the grammatical role (e.g. subject). Figure 1 illus-
trates context reduction and similarity...
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Báo cáo khoa học: "Using lexical and relational similarity to classify semantic relations" pptx
Ngày tải lên :
08/03/2014, 21:20
... distinct types
of word pair similarity: lexical similarity
and relational similarity. We present an
efficient and flexible technique for imple-
menting relational similarity and show the
effectiveness ... relational similarity but not both in com-
bination. Previously proposed lexical models in-
clude the WordNet-based methods of Kim and
Baldwin (2005) and Girju et al. (2005), and the
distributional ... co-occurrence probability
vectors for w
1
and w
2
. Taking k
jsd
as a measure of
word similarity and introducing parameters α and
β to scale the contributions of w
1
and w
2
respec-
tively, we retrieve...
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Báo cáo khoa học: "Syntax is from Mars while Semantics from Venus! Insights from Spectral Analysis of Distributional Similarity Networks" ppt
Ngày tải lên :
17/03/2014, 02:20
... and
intriguing question, whereby we construct the syn-
tactic and semantic distributional similarity net-
work (DSN) and analyze their spectrum to un-
derstand their global topology. We observe that
there ... commonalities and differences be-
tween the syntactic and semantic distributional
patterns of the words of a language? This study is
an initial attempt to answer this fundamental and
intriguing ... popular, visualization of distributional
similarity is through graphs or networks, where
each word is represented as nodes and weighted
edges indicate the extent of distributional similar-
ity...
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Báo cáo khoa học: "Exploring Distributional Similarity Based Models for Query Spelling Correction" docx
Ngày tải lên :
17/03/2014, 04:20
... and describe two methods that can make
use of distributional similarity information in
Section 3. Experiments and results are presented
in Section 4. The last section contains summaries
and ... of valid words in certain
contexts (Golding and Roth, 1996; Mangu and
Brill, 1997).
Distributional similarity between words has
been investigated and successfully applied in
many natural language ...
1998) and language model smoothing (Essen and
Steinbiss, 1992; Dagan et al., 1997). An investi-
gation on distributional similarity functions can
be found in (Lillian Lee, 1999).
3 Distributional...
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Tài liệu Báo cáo khoa học: "Word Vectors and Two Kinds of Similarity" pptx
Ngày tải lên :
20/02/2014, 12:20
... similarity into two
categories: taxonomic similarity and associative
similarity. Taxonomic similarity, or categorical
similarity, is a kind of semantic similarity between
words in the same level ... LSA-based, cooccurrence-based
and dictionary-based methods, were com-
pared in terms of the ability to represent
two kinds of similarity, i.e., taxonomic
similarity and associative similarity. The
result ... addresses three
methods, LSA-based, cooccurrence-based, and
dictionary-based methods, and two kinds of sim-
ilarity, taxonomic similarity and associative sim-
ilarity. Word vectors constructed...
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Tài liệu Báo cáo khoa học: "The Distributional Inclusion Hypotheses and Lexical Entailment" pdf
Ngày tải lên :
20/02/2014, 15:20
...
1994; Lee, 1997; Lin, 1998; Pantel and Lin, 2002;
Weeds and Weir, 2003).
As it turns out, distributional similarity captures
a somewhat loose notion of semantic similarity
(see Table 1). It does ...
Southampton, U.K.
Geffet, Maayan and Ido Dagan, 2004. Feature Vector
Quality and Distributional Similarity. In Proc. of Col-
ing-04. Geneva. Switzerland.
Grefenstette, Gregory. 1994. ... using the
filter, with 20 and 40 feature sampling, com-
pared to RFF top-40 and RFF top-26 simi-
larities. ITA-20 and ITA-40 denote the web-
sampling method with 20 and random 40
features, respectively....
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Tài liệu Báo cáo khoa học: "Japanese OCR Error Correction using Character Shape Similarity and Statistical Language Model " pptx
Ngày tải lên :
20/02/2014, 18:20
... quality photocopies, and faxes are still
difficult to process and cause many errors. The accu-
racy of handwritten OCR is still about 90% (Hilde-
brandt and Liu, 1993), and it worsens dramatically ... 91% for magazines and introductory
textbooks of science and technology. (Ito and
Maruyama, 1992) used part of speech bigram model
and beam search in order to get multiple candidates
in their ... al., 1991; Golding
and Schabes, 1996). Similar techniques are used for
correcting the output of English OCRs (Tong and
Evans, 1996) and English speech recognizers (Ring-
ger and Allen, 1996)....
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Báo cáo khoa học: "Learning to Grade Short Answer Questions using Semantic Similarity Measures and Dependency Graph Alignments" ppt
Ngày tải lên :
07/03/2014, 22:20
... grammaticality,
and coherence of the essay (Higgins et al., 2004),
and the assessment of short student answers (Lea-
cock and Chodorow, 2003; Pulman and Sukkarieh,
2005; Mohler and Mihalcea, 2009), ... & St. Onge (1998) [HSO], and two corpus-
based measures: Latent Semantic Analysis [LSA]
(Landauer and Dumais, 1997) and Explicit Seman-
tic Analysis [ESA] (Gabrilovich and Markovitch,
2007).
Briefly, ... MA.
G. Hirst and D. St-Onge, 1998. Lexical chains as repre-
sentations of contexts for the detection and correction
of malaproprisms. The MIT Press.
J. Jiang and D. Conrath. 1997. Semantic similarity...
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Báo cáo khoa học: "CONTEXTUAL WORD SIMILARITY AND ESTIMATION FROM SPARSE DATA" ppt
Ngày tải lên :
08/03/2014, 07:20
... SIGIR.
Fernando Pereira, Naftali Tishby, and Lillian Lee.
1993. Distributional clustering of English
words. In
Proc. of the Annual Meeting of the
ACL.
Philip Resnik. 1992. Wordnet and distributional ...
using frequency information (Good, 1953; Katz,
1987; Jelinek and Mercer, 1985; Church and Gale,
1991). Church and Gale (Church and Gale, 1991)
show, that for unobserved bigrams, the estimates ... 150 pairs, were constructed
randomly and were restricted to words with indi-
vidual frequencies between 500 and 2500. We term
these two sets as the
occurring
and
non-occurring
sets.
The...
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